Amr bin Wahb al-Thaqafi (may Allah have mercy on him) narrates that Mughirah bin Shu'bah (may Allah be pleased with him) said: I reached Abd al-Rahman bin Awf (may Allah be pleased with him) together with the Prophet (peace and blessings be upon him), and he began to step back, but the Prophet (peace and blessings be upon him) signalled to him (to remain in front). So we prayed (with him) what we caught, and we completed (afterwards) what we had missed.
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 18156