Ibn Buraydah narrates from his father (Sayyiduna Buraydah, may Allah be pleased with him) that the Prophet (peace and blessings be upon him) was brought into the grave from the direction of the qiblah, a niche grave (lahd) was dug for him, and bricks were set upright over it.
This Abu Burdah is Amr bin Yazid al-Tamimi al-Kufi, and he is da'if (weak) in hadith; Yahya bin Ma'in and others declared him weak.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 7056