Hadith 6:915
Waki’ narrated to us, from Musa ibn Ubaydah, from Ya’qub, from Zayd, that the Messenger of Allah (may Allah bless him and grant him peace) threw a handful [of soil] into his grave.
حدثنا وكيع عن موسى بن عبيدة عن يعقوب عن زيد أن رسول الله صلى الله عليه وسلم حثى في قبره