From Sahih Bukhari (Hadith 5444):
Narrated `Abdullah bin `Umar:While we were sitting with the Prophet, fresh dates were brought to him. The Prophet (ﷺ) said, "There is a tree among the trees which is as blessed as a Muslim" I thought that it was the date palm tree and intended to say, "It is the date-palm tree, O Allah's Messenger (ﷺ)!" but I looked behind to see that I was the tenth and youngest of ten men present there, so I kept quiet' Then the Prophet (ﷺ) said, "It is the datepalm tree
Reference: Bukhari 5444