Chapter of Ta'qeeb (Prayer Supplications)
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 47
وَقَالَ أَمِيرُ اَلْمُؤْمِنِينَ عَلَيْهِ اَلسَّلاَمُ: «مَنْ أَرَادَ أَنْ يَكْتَالَ بِالْمِكْيَالِ اَلْأَوْفَى فَلْيَكُنْ آخِرُ قَوْلِهِ: «سُبْحٰانَ رَبِّكَ رَبِّ اَلْعِزَّةِ عَمّٰا يَصِفُونَ `وَ سَلاٰمٌ عَلَى اَلْمُرْسَلِينَ `وَ اَلْحَمْدُ لِلّٰهِ رَبِّ اَلْعٰالَمِينَ» فَإِنَّ لَهُ مِنْ كُلِّ مُسْلِمٍ حَسَنَةً.
The Commander of the Faithful Imam Ali ibn Abi Talib عليه السلام said: "Whoever wishes to be rewarded with the fullest measure (of blessings and rewards), let the last of his words be: 'Subhāna Rabbika Rabbil-'Izzati 'Amma Yasifūn (Glory be to your Lord عز وجل, the Lord عز وجل of Might, above what they describe), Wa Salāmun 'Alal-Mursalīn (And peace be upon the Messengers), Wa Alhamdulillāhi Rabbil-'Ālamīn (And all praise is due to Allah سبحانه وتعالى, the Lord عز وجل of the worlds).' Indeed, for every Muslim, this brings about a good deed”.
- Ṣaḥīḥ al-Faqīh