اَللَّهُمَّ أَعِذْهُ مِنْ عَذَابِ الْقَبْرِ

Allaahumma 'a'idh-hu min 'adhaabil-qabr

Ya Allah, kare shi daga azabar kabari.

Reference: Sahih (Shu'aib al-Arnaut). Al-Muwatta: 540