Hazrat Qambar narrates: I was going alongside the banks of the Euphrates in the company of Amirul Momineen (a). He removed his shirt to take a bath and entered the water. Suddenly a wave rose up from the river and carried away his shirt. When the Imam emerged he could not see his shirt, so he was extremely distraught. At that moment an unseen caller called out:
“Abul Hasan, look to your right and pick up what you see there.”
When he looked to his right, he saw a sheet kept over there in which a shirt was wrapped. When he picked up the shirt and put it on, a note fell out from it as follows:
This is a gift from Allah the mighty and sublime to Ali Ibne Abi Talib (a). And this is the shirt of Harun bin Imran, and We have made another nation inherit it.1
1 Manaqib, Ibne Shahr Ashob, Vol. 2, Pg. 229.