Sahih Bukhari: Hadith 4883

I said, "O Allah's Messenger (ﷺ)! Suppose you landed in a valley where there is a tree of which something has been eaten and then you found trees of which nothing has been eaten, of which tree would you let your camel graze?" He said, "(I will let my camel graze) of the one of which nothing has been eaten before." (The sub-narrator added: `Aisha meant that Allah's Messenger (ﷺ) had not married a virgin besides herself .)