Musnad Ahmad 1149:1

Yazid narrated to us, Jarir ibn Hazim informed us, al-Hasan narrated to us, and ‘Amr ibn Taghlib narrated to us: That the Messenger of Allah (ﷺ) gave to some people and withheld from others. It reached him that they were displeased, so he addressed the people. He praised Allah and extolled Him, then said: "I have given to some people and left others, and they were displeased with me. Verily, I give a gift to a man while another is more beloved to me than him, but I only give them because of the impatience and anxiety in their hearts. And I withhold from a people because of the self-sufficiency and goodness that Allah has placed in their hearts, among whom is ‘Amr ibn Taghlib." ‘Amr said: "I would not be pleased to exchange the words of the Messenger of Allah (ﷺ) for red camels."