Musnad Ahmad 33:762

Qutaybah ibn Sa'id narrated to us, Ibn Lahi'ah narrated to us, from Abu al-Zubayr, from Jabir, who said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, say: "There is no one who supplicates with a supplication except that Allah gives him what he asked for, or He averts from him an equivalent amount of evil, as long as he does not supplicate for a sin or for the severing of kinship ties."