إِنَّهُ مَنْ لَا يَرْحَمْ لَا يُرْحَمْ
It was narrated from Abū Hurayrah – Allāh be pleased with him – that Al-Aqra ibn Habis saw the Prophet (ﷺ), kissing his grandson Hasan.
He said: “I have ten children and I do not kiss any of them.”
The Prophet said: “Verily, whoever does not show mercy will not receive mercy.”
Ṣaḥīḥ al-Bukhārī (5651), Ṣaḥīḥ Muslim (2318)