"Go and wash in the Jordan seven times, and your flesh shall be restored..."

Naaman the Syrian washing in the waters of the Jordan, from the Monastery of the Life-giving Spring, Dunlap, CA (source)

  
So Na'aman came with his horses and chariots, and halted at the door of Eli'sha's house. And Eli'sha sent a messenger to him, saying, "Go and wash in the Jordan seven times, and your flesh shall be restored, and you shall be clean." But Na'aman was angry, and went away, saying, "Behold, I thought that he would surely come out to me, and stand, and call on the name of the LORD his God, and wave his hand over the place, and cure the leper. Are not Aba'na and Pharpar, the rivers of Damascus, better than all the waters of Israel? Could I not wash in them, and be clean?" So he turned and went away in a rage. But his servants came near and said to him, "My father, if the prophet had commanded you to do some great thing, would you not have done it? How much rather, then, when he says to you, 'Wash, and be clean'?" So he went down and dipped himself seven times in the Jordan, according to the word of the man of God; and his flesh was restored like the flesh of a little child, and he was clean.
-II Kings 5:9-14, read at Great Vespers for Theophany

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Naaman the Leper washing in the waters of the Jordan (source)

  

Through the prayers of our Holy Fathers, Lord Jesus Christ our God, have mercy on us and save us! Amen!

"Then he took the mantle of Eli'jah that had fallen from him, and struck the water..."

Prophet Elias ascending in the fiery chariot, and Prophet Elisha striking the Jordan with his mantle (source)

  
Then Eli'jah said to him, "Tarry here, I pray you; for the LORD has sent me to the Jordan." But he said, "As the LORD lives, and as you yourself live, I will not leave you." So the two of them went on. Fifty men of the sons of the prophets also went, and stood at some distance from them, as they both were standing by the Jordan. Then Eli'jah took his mantle, and rolled it up, and struck the water, and the water was parted to the one side and to the other, till the two of them could go over on dry ground. When they had crossed, Eli'jah said to Eli'sha, "Ask what I shall do for you, before I am taken from you." And Eli'sha said, "I pray you, let me inherit a double share of your spirit." And he said, "You have asked a hard thing; yet, if you see me as I am being taken from you, it shall be so for you; but if you do not see me, it shall not be so." And as they still went on and talked, behold, a chariot of fire and horses of fire separated the two of them. And Eli'jah went up by a whirlwind into heaven. And Eli'sha saw it and he cried, "My father, my father! the chariots of Israel and its horsemen!" And he saw him no more. Then he took hold of his own clothes and rent them in two pieces. And he took up the mantle of Eli'jah that had fallen from him, and went back and stood on the bank of the Jordan. Then he took the mantle of Eli'jah that had fallen from him, and struck the water, saying, "Where is the LORD, the God of Eli'jah?" And when he had struck the water, the water was parted to the one side and to the other; and Eli'sha went over.
II Kings 2:6-14, read at Great Vespers for Theophany

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Prophet Elias striking the Jordan with his mantle (source)

  

Through the prayers of our Holy Fathers, Lord Jesus Christ our God, have mercy on us and save us! Amen!

"When you come to the brink of the waters of the Jordan, you shall stand still in the Jordan..."

The Ark of the Covenant parting the waters of the Jordan, from the Monastery of the Life-giving Spring, Dunlap, CA (source)

  
And the LORD said to Joshua, "This day I will begin to exalt you in the sight of all Israel, that they may know that, as I was with Moses, so I will be with you. And you shall command the priests who bear the ark of the covenant, 'When you come to the brink of the waters of the Jordan, you shall stand still in the Jordan.'" And when those who bore the ark had come to the Jordan, and the feet of the priests bearing the ark were dipped in the brink of the water (the Jordan overflows all its banks throughout the time of harvest), the waters coming down from above stood and rose up in a heap far off, at Adam, the city that is beside Zar'ethan, and those flowing down toward the sea of the Arabah, the Salt Sea, were wholly cut off; and the people passed over opposite Jericho. And while all Israel were passing over on dry ground, the priests who bore the ark of the covenant of the LORD stood on dry ground in the midst of the Jordan, until all the nation finished passing over the Jordan.
-Joshua 3:7-8; 15-17, read at Great Vespers for Theophany
  
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Prophet Joshua being anointed by Prophets Moses and Aaron (source)

     

Through the prayers of our Holy Fathers, Lord Jesus Christ our God, have mercy on us and save us! Amen!

"And the LORD showed him a tree, and he threw it into the water, and the water became sweet..."

God granting water and manna to the Israelites in the wilderness (source) 

   
"Then Moses led Israel onward from the Red Sea, and they went into the wilderness of Shur; they went three days in the wilderness and found no water. When they came to Marah, they could not drink the water of Marah because it was bitter; therefore it was named Marah. And the people murmured against Moses, saying, "What shall we drink?" And he cried to the LORD; and the LORD showed him a tree, and he threw it into the water, and the water became sweet. There the LORD made for them a statute and an ordinance and there he proved them, saying, "If you will diligently hearken to the voice of the LORD your God, and do that which is right in his eyes, and give heed to his commandments and keep all his statutes, I will put none of the diseases upon you which I put upon the Egyptians; for I am the LORD, your healer." Then they came to Elim, where there were twelve springs of water and seventy palm trees; and they encamped there by the water."
-Exodus 15:22-27, read at Great Vespers for Theophany
  
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Prophet Moses (source)

  

Through the prayers of our Holy Fathers, Lord Jesus Christ our God, have mercy on us and save us! Amen!