Sayyiduna Jabir (may Allah be pleased with him) narrates: The Prophet Muhammad (peace and blessings be upon him) sent me for some task. When I came to him, I greeted him with salam while he was performing prayer. The Prophet Muhammad (peace and blessings be upon him) replied to me with a gesture. When he finished the prayer, he called me and said: When you greeted me, I was performing prayer. (The narrator says) At that time, the Prophet Muhammad (peace and blessings be upon him) was facing towards the east.
Hadith Referenceصحیح ابن حبان / كتاب الصلاة / 2516
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «صحيح أبي داود» (859): م.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرطهما، إلا أن أبا الزبير- واسمه محمد بن مسلم بن تدرس- خرج له البخاري مقروناً، أبو الوليد: هو هشام بن عبد الملك الطيالسي.