Quran 23:102 from Surah Al-Muminoon on Divine Marvels.
فَمَن ثَقُلَتۡ مَوَٰزِينُهُۥ فَأُوْلَٰٓئِكَ هُمُ ٱلۡمُفۡلِحُونَ
English translation: Then (the one) whose (are) heavy his scales then those they (are) the successful
Transliteration: faman thaqulat mawazinuhu fa-ulaika humu al-muf'lihuna