120. Leave sin, open and secret. Verily, those who commit sin will get due recompense for that which they used to commit.

Mujahid said that,

Leave evil, open and secret...}

refers to all kinds of sins committed in public and secret. Qatadah said that,

Leave sin, open and secret...}

encompasses sins committed in public and secret, whether few or many. In another statement, Allah said,

Say: "(But) the things that my Lord has indeed forbidden are Al-Fawahish (evil sins) whether committed openly or secretly.} [7:33]

This is why Allah said,

Verily, those who commit sin will get due recompense for that which they used to commit.}

Whether the sins they committed were public or secret, Allah will compensate them for these sins. Ibn Abi Hatim recorded that An-Nawwas bin Sam'an said, "I asked Allah’s Messenger about Al-Ithm. He said,

'The sin is that which you find in your heart and you dislike that people become aware of it.'"