Al-Kāfi - Volume 6 > Kindness to Children
Hadith #5

عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَمَّنْ ذَكَرَهُ عَنْ أَبِي عَبْدِ اللَّهِ ( عليه السلام ) قَالَ إِنَّ اللَّهَ لَيَرْحَمُ الْعَبْدَ لِشِدَّةِ حُبِّهِ لِوَلَدِهِ .

5. Ali ibn Ibrahim has narrated from his father from ibn abu ‘Umayr from those whom he has mentioned who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said, ‘Allah will have mercy on (His) slave because of his intense love for his children.’”