Is it permissible to pray beside the imam due to the mosque being full?

Question:
May Allah reward you. The Honorable Shaykh says: If the mosque is full, is it permissible to pray beside the imam, to his right or to his left?

Answer:
Yes, yes, but it is better to be on his right. If there is no space on his right, so that he ends up on his left, that is because there are people in the congregation on his right. Even if they are behind him, they block the space on his right. Yes, even if they are behind him.
But if a person comes alone and the imam is alone, and there are no other people in the congregation, he should not stand on the imam's left, but rather on his right. This is because when Ibn 'Abbas (may Allah be pleased with him) came and stood to the left of the Messenger (peace and blessings be upon him), the Prophet (peace and blessings be upon him) turned him around and placed him on his right. If there is only one person with the imam, he turns him to his right. However, if there are people on the imam's right or behind him, it is permissible for one person to be on his left, especially if the space is not the same.