مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 1705
Funerals
Burying the Dead - Section 2
وَعَنِ ابْنِ عَبَّاسٍ قَالَ: سُلَّ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مِنْ قِبَلِ رَأْسِهِ. رَوَاهُ الشَّافِعِي
Ibn 'Abbas said God’s messenger was lowered gently into the grave head first. Shafi'i transmitted it.
Mishkat al-Masabih, 1705ضَعِيف (الألباني)