Jesus performs a miracle at the pool of Bethesda. There were many people there waiting for something miraculous to occur…
One man was there who had been sick for 38 years. When Jesus saw him lying there and knew he had already been there a long time, He said to him, “Do you want to get well?”
“Sir,” the sick man answered, “I don’t have a man to put me into the pool when the water is stirred up, but while I’m coming, someone goes down ahead of me.”
“Get up,” Jesus told him, “pick up your mat and walk!” Instantly the man got well, picked up his mat, and started to walk. John 5:5-8, HCSB.
William Barclay writes in his commentary on John… “Beneath the pool was a subterranean stream which every now and again bubbled up and disturbed the waters. The belief was that the disturbance was caused by an angel, and that the first person to get into the pool after the troubling of the water would be healed from any illness from which he was suffering.”
“To us this is mere superstition. But it was the kind of belief which was spread all over the world in ancient days and which still exists in certain places. People believed in all kinds of spirits and demons. The air was thick with them; they had their abodes in certain places; every tree, every river, every stream, every hill, every pool had its resident spirit.”
“It may be that as Jesus walked around, the man of this story was pointed out to him as a most pitiable case, because his disability made it very unlikely, even impossible, that he would ever be the first to get into the pool after it had been troubled. He had no one to help him in, and Jesus was always the friend of the friendless, and the helper of the man who has no earthly help. He did not trouble to read the man a lecture on the useless superstition of waiting for the water to be moved. His one desire was to help and so he healed the man who had waited so long.”
https://www.studylight.org/commentaries/dsb/john-5.html There is much to learn in this passage about the myths surrounding the healing power of the water and also much to be aware of with the Pharisees who condemned Jesus for healing on the Sabbath. Listen to Jesus before anyone else.