question #1 Sahih al-Bukhari 2779, Book 55, Hadith 42 : What does this narration teach about the attitude of selflessness and generosity in Islam?

The Prophet (ﷺ) said (at the time of building the Mosque), “O Ban, An-Najjar! Suggest to me a price for
your garden.” They replied, “We do not ask its price except from Allah.”