Musannaf Ibn Abi Shayba 3:5254

Yazid ibn Harun narrated to us, from Hammad ibn Salamah, who said: Thabit ibn Aslam narrated to us, who said: Silat ibn Ashyam narrated to us, that the Messenger of Allah (may Allah bless him and grant him peace) said: "Whoever prays two rak'ahs in which he does not speak to himself about anything of the world, he will not ask Allah for anything except that He will grant it to him."