Abu Hurayra reported that the Messenger of Allah (ﷺ) said, "When one of you comes to a gathering, he should give the greeting. If he leaves, he should give the greeting. Neither is more of a duty than the other."
Reference: Al-Adab Al-Mufrad 1007 In-book : Book 42, Hadith 44 English translation : Book 42, Hadith 1007
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