Volume 2, Book 22, Number 308:
Narrated Jabir bin ‘Abdullah:
Allah’s Apostle sent me for some job and when I had finished it I returned and came to the Prophet
and greeted him but he did not return my greeting. So I felt so sorry that only Allah knows it and I
said to myself,, ‘Perhaps Allah’s Apostle is angry because I did not come quickly, then again I greeted
him but he did not reply. I felt even more sorry than I did the first time. Again I greeted him and he
returned the greeting and said, “The thing which prevented me from returning the greeting was that
I was praying.” And at that time he was on his Rahila and his face was not towards the Qibla.
Volume 2 – 279 / 1700
SAHIH BUKHARI VOLUME 2 > BOOK 22: ACTIONS WHILE PRAYING