Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) passed by a grave in which the deceased had just been buried. The Prophet (peace and blessings be upon him) said: "Two light rak‘ahs, which you consider insignificant and extra, if the occupant of this grave could add them to his deeds, they would be more beloved to him than the remainder of your world."