Jabir bin Samurah (May Allah be pleased with them) reported: The Messenger of Allah ﷺ came out to us (once) and said, "Why do you not stand in rows as the angels do before their Rabb?" We asked: "O Messenger of Allah! how do the angels stand in rows before their Rabb?" He ﷺ replied, "They complete each row beginning with the first and filling all the gaps". Muslim.
The Prophet Muhammad's teaching reminds us of how important it is for us to show respect and unity when gathering together, whether it be for prayer or any other purpose. By standing in perfect rows like the angels do before their Lord, we can demonstrate our obedience and commitment towards Allah's commands while also showing respect towards one another by filling all gaps between people within each row.