صحیح ابن حبان
Ibn Hibban
كتاب الصلاة
Book of Prayer
باب صفة الصلاة - ذكر ما يستحب للمصلي أن يجافي في سجوده حتى يرى بياض إبطيه
Chapter on the Manner of Prayer – Recommendation to spread the arms in prostration until the whiteness of the armpits is visible
1 hadith
Hadith 1919
Sayyiduna Ibn Buhaina (may Allah be pleased with him) narrates: When the Prophet (peace and blessings of Allah be upon him) would go into prostration, he would spread his arms so much that the whiteness of his armpits would become visible.