Call to Prayers (Adhaan)
10/95. Chapter:
Recitation of the Qur'an (Surat Al-Fatiha) is compulsory for the Imam and the followers, at the home and on journey, in all As-Salat (the prayers) whether the recitation is done silently or aloud.
Sahih Bukhari
حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، قَالَ حَدَّثَنَا سُفْيَانُ، قَالَ حَدَّثَنَا الزُّهْرِيُّ، عَنْ مَحْمُودِ بْنِ الرَّبِيعِ، عَنْ عُبَادَةَ بْنِ الصَّامِتِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ صَلاَةَ لِمَنْ لَمْ يَقْرَأْ بِفَاتِحَةِ الْكِتَابِ ".
Narrated 'Ubada bin As-Samit: Allah's Messenger (ﷺ) said, "Whoever does not recite Al-Fatiha in his prayer, his prayer is invalid."
Reference : Sahih al-Bukhari 756In-book reference : Book 10, Hadith 150USC-MSA web (English) reference : Vol. 1, Book 12, Hadith 723