Mishkat al-Masabih #2903

Anas said that when God’s Messenger came to Medina the Emigrants came to him and said, “Messenger of God, we have never seen people more liberal out of abundance or better in giving help when they have little than a people among whom we have settled. They have removed our trouble and shared with us their pleasant things so that we are afraid they will get the whole reward." He replied, ‘No, as long as you make supplication to God for them and express commendation of them*.” * They have no reason to fear that the Ansar will get all the reward from God so long as due expression of thanks is made. Tirmidhi transmitted it saying that it is sahih.