From Sahih Muslim (Hadith 2437):
Anas b. Malik reported that when Allah conferred upon His Messenger (ﷺ) the riches of Hawazin (without armed encounter) ; the rest of the hadith is the same except some variation (of words):" Anas said: We could not tolerate it and he also said: The people were immature in age
Reference: Muslim 2437