ENOfficial
Qayla reported that a mans aid, "Peace be upon you, may Allah bless him and grant him peace." He said, "And peace be upon you and the mercy of Allah."
Source: sunnah.com
Other translations
Arabic
قَالَ أَبُو عَبْدِ اللهِ: وَقَالَتْ قَيْلَةُ: قَالَ رَجُلٌ: السَّلاَمُ عَلَيْكَ يَا رَسُولَ اللهِ، قَالَ: وَعَلَيْكَ السَّلاَمُ وَرَحْمَةُ اللهِ.
sunnah.com