Light on the tongue, heavy on the scale
كَلِمَتَانِ خَفِيفَتَانِ عَلَى اللِّسَانِ، ثَقِيلَتَانِ فِي الْمِيزَانِ، حَبِيبَتَانِ إِلَى الرَّحْمَنِ: سُبْحَانَ اللَّهِ وَبِحَمْدِهِ، سُبْحَانَ اللَّهِ الْعَظِيمِ
Kalimatani khafifatani ala-l-lisan, thaqilatani fi-l-mizan, habibatani ila-r-rahman: SubhanAllahi wa bi-hamdih, SubhanAllahi-l-adheem.
"Two phrases light on the tongue, heavy on the scale, beloved to the Most Merciful: SubhanAllahi wa bi-hamdih, SubhanAllahi-l-adheem."
Narrated by Abu Hurayrah. Sahih al-Bukhari 6406, Sahih Muslim 2694
A short reflection
Cost nothing. Weigh everything. The Prophet ﷺ kept advising the most efficient transaction in the universe.