'Abdur-Rahman bin 'Ali bin Shaiban narrated that his father, 'Ali bin Shaiban, who was part of the delegation, said: "We set out until we came to the Prophet ﷺ. We gave him our oath of allegiance and performed prayer behind him. Then we offered another prayer behind him. He finished the prayer and saw a man on his own, praying behind the row". He said: "The Prophet of Allah ﷺ stood beside him and when he finished he said: 'Repeat your prayer; there is no prayer for the one who is behind the row.’"
This hadith also teaches us about following instructions from our elders or those in authority over us such as teachers or parents. We should always listen carefully to what they say and follow their instructions even if we don’t understand why at first because there may be a good reason for it that we can’t see yet.