Sunan Abi Dawud — Funerals (Kitab Al-Jana'iz) — Hadith No: 3211
Translation
Abu Ishaq said:Al-Harith left his will that Abdullah ibn Yazid should offer his funeral prayer; so he prayed over him. He then put him in the grave from the side of his legs and said: This is a Sunnah (model practice of the Prophet)