An-Nawawi's 40 Hadith 15
الأربعون النووية#15Not gradedOn the authority of Abu Hurayrah (may Allah be pleased with him), that the Messenger of Allah (peace and blessings of Allah be upon him) said: Let him who believes in Allah and the Last Day speak good, or keep silent; and let him who believes in Allah and the Last Day be generous to his neighbour; and let him who believes in Allah and the Last Day be generous to his guest. [Al-Bukhari] [Muslim]
Scholarly Authentication
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In-book reference: 1:15