(138) باب مَنْ تَرَكَ الْقِرَاءَةَ فِي صَلاَتِهِ بِفَاتِحَةِ الْكِتَابِ
Abu Hurairah reported the Messenger of Allah (ﷺ) as saying:
Go out and announce in medina that prayer is not valid but the recitation of the Qur'an even though it might be fatihat al-kitab and something more.
Reference: Sunan Abi Dawud 819
In-book reference: Book 2, Hadith 429
English translation: Book 2, Hadith 818