صحیح ابن حبان
Ibn Hibban
كتاب الصلاة
Book of Prayer
باب صفة الصلاة - ذكر الخبر المدحض قول من زعم أن المصطفى صلى الله عليه وسلم يجهر ببسم الله الرحمن الرحيم في كل الصلوات
Chapter on the Manner of Prayer – Report refuting the claim that the Prophet recited “Bismillah” aloud in every prayer
1 hadith
Hadith 1802
Sayyiduna Anas (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him), Sayyiduna Abu Bakr (may Allah be pleased with him), and Sayyiduna Umar (may Allah be pleased with him) did not recite «بسم الله الرحمن الرحیم» in a loud voice.