The author of Thaqibul Manaqib writes: I read in the book of one of my trustworthy friends that a Syrian came with his wife to Imam and said: O Son of Abu Turab. Then he heaped insults on the Holy Imam (a) which I cannot quote. And he challenged: If you are right, make me a woman and turn my wife into a male.
The Imam (a) was extremely angry at the insults and he glared at that man with furious eyes. Then he moved his lips in a prayer, which we could not understand. Then he looked at that man intently.
When that Syrian groped himself, he was very much ashamed and he glanced down due to it. When he passed his hand over his face his facial hair was missing. He turned to go away. Just then his wife said: I have become a man!
They arose and went away from there and lived with each other together in the same condition. They also gave birth to a child. Then they came once more to the Holy Imam (a) and sought forgiveness crying incessantly; and beseeched him to restore their conditions.
Imam (a) raised his hands in the court of Almighty Allah and prayed:
O God, if these two are truthful, please accept their repentance and restore their original condition.
Afterwards they returned to their previous conditions.1
1 Al-Kafi, Vol. 1, Pg. 462; Basairud Darajaat, Pg. 356.