It is narrated from Ibn Abbas (may Allah be pleased with him) that he said: The Messenger of Allah (peace and blessings be upon him) was lowered into the blessed grave from the side of the head.
Hadith Referenceمسند الإمام الشافعي / كتاب الجنائز / 600
Hadith Takhrijاسناده ضعيف الجهالة الثقة وعمر بن عطاء ضعيف : اخرجه البيهقي : 4 / 54 ۔ وفى المعرفة السنن والآثار له (2177)۔
Ja'far bin Muhammad narrates from his father that he said: The Messenger of Allah (peace be upon him) threw three handfuls of soil on the deceased with both his hands.
Hadith Referenceمسند الإمام الشافعي / كتاب الجنائز / 601
Hadith Takhrijاسناده ضعيف جدا، لضعف شيخ الشافعى ولإرساله اخرجه البيهقي في المعرفة السنن والآثار (2180)۔
Ja'far bin Muhammad narrates from his father that the Prophet (peace be upon him) sprinkled water on the grave of his son Ibrahim, and placed pebbles on it, and the pebbles can only remain on the level part of the grave.
Hadith Referenceمسند الإمام الشافعي / كتاب الجنائز / 602
Hadith Takhrijاسناده ضعيف جدا، لضعف شيخ الشافعي ، ولإرساله : اخرجه البيهقي : 411/3 ۔ وفي المعرفة السنن والآثار له (2181) وابوداود في المراسيل (420)۔