Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
The grave in a dream indicates prison, and prison indicates the grave. Digging a grave indicates building a house in that place. Whoever sees himself being buried alive in a grave will be imprisoned or afflicted with worry and grief. Visiting graves indicates visiting prisoners. An unknown grave indicates mingling with hypocrites.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
The grave indicates the abode of the Hereafter. It might also indicate marriage for the unmarried, because the grave brings people together just as marriage does. Whoever sees himself building a grave is building a house. Walking among graves indicates seeking a need from stingy people or striving for a false matter.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
The grave is interpreted as prison and worry. Whoever sees himself being buried alive will be imprisoned or afflicted with great worry. Rain on graves is mercy from Allah for their occupants. Whoever sees himself digging his own grave will have a long life. An exhumed grave indicates the uncovering of a hidden matter.