Does the punishment of the grave for a Muslim diminish his sins, by analogy with the alleviation of sins in the Fire?

Allah Almighty is the Just Judge who wrongs no one in the slightest. Whoever commits an evil deed will not be recompensed except with its like, and whoever comes with a good deed will have ten times its like.

It is obligatory to believe that whoever dies as a monotheist will enter Paradise, even if they are punished before it, and whoever dies as a polytheist will enter Hellfire. It is not possible to definitively state that a specific person will be punished or have their punishment lightened, as that depends on Allah's will, justice, and grace.

Scholars have mentioned that there are ten reasons that expiate sins, including: 1. Repentance. 2. What occurs in the grave, such as trials, constriction, and fright. 3. Seeking forgiveness (Istighfar). 4. Erasing good deeds. 5. Expiating calamities. 6. The prayers of Muslims. 7. The trial in the Barzakh (definition) (interim period between death and resurrection). 8. The trial at the Standing on the Day of Resurrection. 9. The intercession of intercessors. 10. Sincere monotheism and the mercy of the Most Merciful of those who show mercy.

If these reasons fail to expiate sins, then entry into Hellfire is inevitable, after which they will be brought out of it.