The ruling on a man praying alone behind the rows

He says: If a person enters the mosque and the row behind the imam is full, and no one from the row lags behind with him, does he pray alone?
Answer: He must pay attention to his position. Many people, when they enter while the people are praying, do not pay attention to their position. If he makes an effort, he will usually find a gap in which to pray. If he does not find one, he should pray with the imam on the imam's right if possible. He should not pray alone behind the row, nor should he pull anyone; because the Messenger of Allah (peace and blessings be upon him) said: , and there is no authentic hadith indicating the permissibility of pulling someone. Also, pulling someone creates a gap in the row, and it is obligatory to fill the gaps and not create a gap in the row. So the person entering should wait if he does not find a gap. If he finds someone to pray with, praise be to Allah; otherwise, he should pray alone after the salam, following the imam's salam.
Usually, whenever he makes an effort to align with the row and look for gaps in the row, he will usually find a gap, even at the end of the row, so that he can pray in the row. But suppose he finds nothing and is unable to pray on the imam's right, then he remains waiting until he prays alone after the imam, or until a person comes and prays with him in a separate row.
The evidence, as mentioned earlier, is that the Prophet (peace and blessings be upon him) said: , and it is established from him (peace be upon him): This indicates that one person does not stand behind the row or behind the imam. Rather, if the imam has no one with him, he stands on his right. If the imam has rows, he looks for a gap in the row. If he finds one, praise be to Allah; otherwise, he waits until he finds one, or he moves forward and stands on the imam's right if that is possible. Yes.
The presenter: May Allah reward you.