اَللَّهُمَّ أَعِذْهُ مِنْ عَذَابِ الْقَبْرِ

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

O Allah, protect him from the torment of the grave. Narrated by Sa’eed Ibn Musayyib (R) He said, "I perform janaza of a child behind Abu Hurairah (RA) who has never committed any sin." There I heard Abu Huraira (RA) say: (The dua is Mentioned above)

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