Hadith #5195 (Sunan Abi Dawud)
Book: General Behavior (Kitab Al-Adab)
Narrator(s): Abu Umama bin Sahl, al-Dahhak bin Mukhlad Abu 'Asim al-Nabil الضحاك بن مخلد أبو عاصم النبيل, Muhammad bin Yahya bin Faris al-Dhahli محمد بن يحيى بن فارس الذهلي, Muhammad bin Ziyad al-Alhani محمد بن زياد الألهاني, Wahb bin Khalid al-Hmyry Abu وهب بن خالد الحميري
Grade: Sahih

A man came to the Prophet (ﷺ) and said: Peace be upon you! He responded to his salutation. He then sat down. The Prophet (ﷺ) said: Ten. Another man came and said: Peace and Allah’s mercy be upon you! He responded to his salutation when he sat down. He said: Twenty. Another man came and said: Peace and Allah’s mercy and blessings be upon you! He responded to him and said when he sat down: and blessings be upon you! He responded to him and said when he sat down: Thirty.

Source: https://parallelquran.com/hadith/sunan-abi-dawud-5195/