Musannaf Ibn Abi Shayba 33:813

Muhammad ibn Bishr narrated to us, he said: I heard Hani ibn Uthman narrating from his mother, Humaydah bint Yasir, from her grandmother, Yasirah—and she was one of the female emigrants—she said: The Messenger of Allah (may Allah bless him and grant him peace) said to us: "You must perform tasbih (saying SubhanAllah), takbir (saying Allahu Akbar), and taqdis (saying Subbuhun Quddus), and do not be heedless, lest you forget the mercy."