Surah Az-Zalzalah, ayah 8

وَمَن يَعۡمَلۡ مِثۡقَالَ ذَرَّةٖ شَرّٗا يَرَهُۥ ٨

Waman ya'mal mithqāla dharratin sharran yarah

And whoever does an atom's weight of evil will see it.