Du'a when placing the deceased in the grave

بِسْمِ اللهِ وعَلَى سُنَّة رَسُولِ اللهِ صَلَّى اللهُ عَليهِ وَسَلَّم

Bismallah Wa Aala Sunnati Rasooli Allah Salaa Allahu Alaihi Wa Salam

In the Name of Allah and Upon the Sunnah the Messenger of Allah

Sunan Abī Dāwūd 3213