Hadithcore
Mishkat al-Masabih, 2298

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.)

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

References1 variant
In-Book Reference
Book 9, Hadith 72