Takhrij Hadith 1444: "I followed the Messenger of…"

I followed the Messenger of Allah ﷺ while he was riding, so I placed my hands upon his foot and said: “Teach me from Surah Yusuf.” He replied: “You will never recite anything more far-reaching [in its acceptance/benefit] in the sight of Allah than {Say, “I seek refuge in the Lord of the daybreak”} [Surah Al-Falaq].”