306. Powerful Janaza Dua for Deceased Child Islam
The famous Tabi'i Hasan Basri (R) used to recite Surah Fatiha at the janaza of child and recite the following du'a:
اَللَّهُمَّ اجْعَلْهُ لَنَا سَلَفًا وَّفَرَطًا وَّأَجْرًا
اَللّٰهُمَّ اجْعَلْهُ لَنَا سَلَفًا وَّفَرَطًا وَّاَجْرًا
Allahum-maj'alhu lanaa salafan, wa faratan, wa 'ajran
Translation
O Allah, make him for us a precursor, a forerunner and a cause of reward.