Is the prayer of a single person valid behind the rows?

Question:
Shaykh Salih, Abu Salim says: I want the Shaykh (may Allah preserve him) to state the stronger position regarding the prayer of a single person behind the rows. Usually, I enter the mosque and it is spacious, and the rows are long, Honorable Shaykh, so I do not find anyone to pray with me behind the rows, so I pray alone behind the rows.

Answer:
My brother, this is not permissible for you. You say that the row is not complete, so you should be in the row, even if the row is long, you should be in the row. If someone comes with you to form a row with you, you are behind the row, there is no harm. But if you pray alone behind the row, this is not permissible. The Prophet (peace and blessings be upon him) saw a man praying alone behind the row, so he ordered him to repeat it, and he said (peace and blessings be upon him) Yes.