Al-Kāfi - The Book of Prayer

Chapter: Salah (prayer) for one’s Needs ِنْ أَصْحَابِنَا عَنْ أَحْ٠َّدٍ عَنِ ابْنِ فَضَّالٍ عَنْ ثَعْلَبَةَ بْنِ ٠ُونٍ عَنِ الْحَارِثِ بْنِ الْ٠ُغِيرَةِ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلا٠) قَالَ إِذَا أَرَدْتَ حَاجَةً فَصَلِّ رَكْعَتَيْنِ وَصَلِّ عَلَى ٠َّدٍ وَسَلْ تُعْطَهُ. 10.

A number of our people have narrated from Ahmad ibn Muhammad from ibn Faddal from Tha’labah ibn Maymun from al-Flarith ibn al-Mughirah who has said the following: “Abu ‘Abd Allah (a.s.), has said, ‘If you need something, perform two Rak‘at Salah (prayer) and say, “Allahumma Salli ‘Ala Muhammad wa ‘Ali Muhammad (O Allah grant Muhammad and his family a compensation worthy of their serving Your cause).” Ask for your needs.

They will be fulfilled.’” وثق - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (15/464))