The Prophet ﷺ said, "There is no prayer for the one who does not recite the Opening of the Book."
أخبرنا محمد بن منصور عن سفيان عن الزهري عن محمود بن الربيع
عن النبي ﷺ قال لا صلاة لمن لم يقرأ بفاتحة الكتاب
Bukhari included it in the Book of Adhan, chapter on the obligation of recitation for the imam and the follower in all prayers, etc., hadith no. 756, and Muslim included it in the Book of Prayer, chapter on the obligation of reciting Fatihah in every rakat, hadith no. 394, from the hadith of Sufyan bin Uyayna with this chain, and it is in Al-Kubra, hadith no. 982.