Ismail ibne Sahl narrates –
I asked Imam Reza (a.s.) –
Teach me a supplication on reciting which I can be with you (Ahle Bait a.s.) in the world and the hereafter. He (a.s.) wrote to me –
📌Increase recitation of Chapter of
ﺇِﻧَّﺎ ﺃَﻧْﺰَﻟْﻨَﺎﻩُ
(Surah Qadr Surah no 97)
📌and habituate your lips to seeking forgiveness.
أَسْتَغْفِرُ اللّهَ وَأَتُوبُ إلَيْهِ.
[Reference: Salwah al-Hazeen (Al-Dawaat) by Qutb al-Deen al-Raawandi Pg 49]