It is narrated from Hazrat Ya'la bin Murrah (may Allah be pleased with him) that one day I went out towards the desert with the Prophet (peace and blessings of Allah be upon him). Upon reaching a certain place, the Prophet (peace and blessings of Allah be upon him) said, "Go to those two trees and tell them that the Messenger of Allah (peace and blessings of Allah be upon him) commands you, by Allah's permission, to come together." So I went to them and said this, and the two trees came together. The Prophet (peace and blessings of Allah be upon him) then relieved himself, and after returning, said, "Go and tell them that the Prophet (peace and blessings of Allah be upon him) commands you to return to your respective places." And so it happened.