"A side-lying grave was made for Adam (peace be upon him), and he was washed with water an odd number of times. So the angels said: This is the Sunnah for the children of Adam after him."

“The angels bathed Adam (peace be upon him) with water and leaves of the lote tree, shrouded him, made a side grave for him, and said: O children of Adam! This is your tradition regarding your deceased.”