The ruling on the prayer of one who prays alone behind the rows if he finds no space in the rows

Question:
He says: Honorable Shaykh, may Allah grant you success, if a worshipper comes to the congregation and finds that the first row is full, does he pray alone behind the row, or does he pull one of the worshippers from the first row to stand beside him?

Answer:
He does not pull anyone, and he does not pray alone. He waits until someone comes to pray with him, or he tries to enter the row, finding a space for himself and entering it. As for praying alone behind the row, the Messenger (peace and blessings be upon him) forbade it. He saw a man praying alone behind the row and ordered him to repeat the prayer.