سنن النسائي

It was narrated from Tariq that a man became Junub and did not pray, then he came to the Prophet (ﷺ) and mentioned that to him. He said: "You did the right thing." Another man became Junub and performed Tayammum and prayed, and he came to him and he said something similar to what he had told the other man - meaning, you did the right thing.