Musannaf Ibn Abi Shayba 3:3967

Abu Dawud narrated to us, from Zam'ah, from Ibn Tawus, from his father, that he used to recite in the two rak'ahs before the morning prayer: "When the earth is shaken" (Az-Zalzalah) and "By the racers" (Al-'Adiyat). And in the two rak'ahs after the night prayer (Isha): "The Messenger has believed" (Amana ar-Rasulu) and "Say, He is Allah, [who is] One" (Qul Huwa Allahu Ahad).