اللَّهُمَّ اجْعَلْهُ لَنَا فَرَطاً، وَسَلَفاً، وَأَجْراً

O Allah, make him for us a precursor, a forerunner and a cause of reward.

Allaahum-maj'alhu lanaa faratan, wa salafan, wa 'ajran.

Al-Hasan (Al-Basri) used to recite Al-Fatihah for a child's funeral and then say this. Al-Bukhari, Kitabul-Jana'iz, p. 65.