Hadith #15 (The Forty Hadith of Imam Nawawi)
Book: Good speech, honoring neighbors and guests
Narrator(s): Abu Hurairah
Grade: Sahih

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.

Source: https://parallelquran.com/hadith/forty-nawawi-15/