ركعتان يركعهما ابن آدم فى جوف الليل الاخر خير له من الدنيا وما فيها ولو لا ان اشق على امتي لفرضتهما عليهم
"The two rak‘ahs that the son of Adam performs in the last part of the night are better for him than the world and whatever is in it, and if it were not that I would place a burden on my ummah, I would have made these rak‘ahs obligatory upon them."