Riyad as-Salihin 850 — The Book of Greetings

'Imran bin Husain Narrated from:

A man came to the Prophet (ﷺ) and said: "As-Salamu 'Alaikum (May peace be upon you). The Messenger of Allah (ﷺ) responded to his greeting and the man sat down. The Prophet (ﷺ) said, "Ten (meaning the man had earned the merit of ten good deeds)."Another one came and said: "As-Salamu 'Alaikum wa Rahmatullah (May peace be upon you and the Mercy of Allah)." The Messenger of Allah (ﷺ) responded to his greeting and the man sat down. The Messenger of Allah (ﷺ) said, "Twenty." A third one came and said: "As-Salamu 'Alaikum wa Rahmatullahi wa Barakatuhu (May peace be upon you and the Mercy of Allah and His Blessings)." The Messenger of Allah (ﷺ) responded to his greeting and the man sat down. The Messenger of Allah (ﷺ) said, "Thirty."[Abu Dawud and At- Tirmidhi, who classified it as Hasan].