It was narrated that Sa'd said: Make a niche for me in the side of the grave and set up (bricks) over me as was done for the Messenger of Allah.
It was narrated from 'Amir bin Sa'd that when Sa'd was dying he said: Make a niche for me in the side of the grave and set up (bricks) over me as was done for the Messenger of Allah.
It was narrated from Sa'eed bin Jubair that Ibn 'Abbas said: The Messenger of Allah said: The niche is for us and the ditch is for others. (Daif)