Musannaf Ibn Abi Shayba 33:540

Yahya ibn Ya'la narrated to us, from Mansur, from Talq ibn Habib, from Anas ibn Malik, who said: "There are three things, whoever possesses them will find the taste and sweetness of faith: that Allah and His Messenger are more beloved to him than anything else besides them; that he loves for the sake of Allah and hates for the sake of Allah; and that if a fire were kindled for him to fall into, it would be more beloved to him than to associate partners with Allah."