Musannaf Ibn Abi Shayba 21:604

Yahya ibn Sa'id al-Qattan narrated to us, from Sufyan, from Abu Hashim, from Abu Mijlaz, that al-Husayn ibn Ali saw a man who mounted a beast and said: "Exalted is He who has subjected this to us, and we could not have [otherwise] subdued it." He said: "Is this what you were commanded with?" He said: "How should I say it?" He said: "Say: Praise be to Allah who guided me to Islam. Praise be to Allah who favored me with Muhammad, may Allah bless him and grant him peace. Praise be to Allah who placed me in the best nation produced for mankind. Then you say: Exalted is He who has subjected this to us."