Musannaf Ibn Abi Shayba 21:160

Ubaydah ibn Humayd narrated to us, from Mansur, from Muhammad ibn al-Munkadir, who said: It was narrated to me that the Messenger of Allah (may Allah bless him and grant him peace) used to say when he reached the morning: "By You we have reached the morning, and by You we live, and by You we die, and to You is the destination." And when he reached the evening, he would say: "By You we have reached the evening, and by You we live, and by You we die, and to You is the destination."