It was narrated from 'Ata' bin Yasar that two men - and he quoted the Hadith.
Sunan an-Nasa'i Book 4, Hadith 39
← Previous Hadith "You followed the Sunnah and your prayer is acceptable." And he said to the other: "And you will have something like the reward of two prayers."

Sunan an-Nasa'i Book 4, Hadith 38 Next Hadith → "You did the right thing." Then another man became Junub so he performed Tayammum and prayed. He came (to the Prophet (ﷺ)) who said to him what he had said to the other man- meaning, "You did the right thing."

Sunan an-Nasa'i Book 4, Hadith 40