'Abdullah bin 'Umar used to say that the Messenger of Allah (ﷺ)said:
"Spread (the greeting og) Salam, offer food (to the needy),andbe brothers as Allah, the Mighty and Sublime, has honored you." (DE)
English reference (DE): Vol. 4, Book 29, Hadith 3252 (DE)
Arabic reference (DE): Book 29, Hadith 3375 (DE)