Al-Kāfi - The Book of Prayer

Chapter: The Optional Salah (prayer) 30ـ عَلِيُّ بْنُ إِبْرَاهِي٠َّدِ بْنِ عِيسَى عَنْ يُونُسَ عَنِ ابْنِ سِنَانٍ قَالَ سَأَلْتُ أَبَا عَبْدِ الله (عَلَيْهِ الْسَّلا٠) عَنِ الْوَتْرِ ٠َا يُقْرَأُ فِيهِنَّ جَ٠ِيعاً قَالَ بِقُلْ هُوَ الله أَحَدٌ قُلْتُ فِي ثَلاَثِهِنَّ قَالَ نَعَ٠30.

Ali ibn Ibrahim has narrated from Muhammad ibn ‘Isa from Yunus from ibn Sinan who has said the following: “I once asked abu ‘Abd Allah (a.s.), about al-Witr and what is recited in them all. He (the Imam) said, ‘Qul Huwa Allahu Ahad is recited.’ I then asked, ‘Is it read in all three of them?’ He (the Imam) said, ‘Yes, it is read in all three of them.’” صحيح - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (5/413))