مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 2298
Supplications
The Reward for Glorifying, Praising, Declaring God’s Unity and His Greatness - Section 1
وَعَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: كَلِمَتَانِ خَفِيفَتَانِ عَلَى اللِّسَانِ ثَقِيلَتَانِ فِي الْمِيزَانِ حَبِيبَتَانِ إِلَى الرَّحْمَنِ: سُبْحَانَهُ الله وَبِحَمْدِهِ سُبْحَانَهُ الله الْعَظِيم
He reported God’s messenger as saying, "Two expressions which are light on the tongue but heavy in the scale are dear to the Compassionate One: Glory be to God, and I begin with praise of Him; and Glory be to God the Incomparably Great." (Bukhari and Muslim.)
Mishkat al-Masabih, 2298مُتَّفَقٌ عَلَيْهِ (الألباني)