Hazrat Suwaid says that Hazrat Bilal used to align our shoulders and our feet during prayer.

Hazrat Abdullah says: Keep the rows straight.

Ibrahim says that the elders used to say: "Keep the rows straight and stand joined together, lest Satan slip in among you in the form of lambs."

Hazrat Abu Uthman says that I have not seen anyone more careful than Hazrat Umar in straightening the rows. Sometimes it would happen that he would face the Qiblah and begin to say the Takbeer, then turn around and look at our shoulders and feet. Hazrat Umar used to send a person who would make people stand in the rows.

Hazrat Abu Saeed narrates that the Holy Prophet (peace and blessings be upon him) said: Allah Almighty smiles at three types of people: first, those who stand in rows for prayer; second, the person who fights ahead of his companions; and third, the one who stands in worship during the darkness of the night.

Hazrat Jabir bin Samurah narrates that the Messenger of Allah, peace and blessings be upon him, said: "Why do you not form rows as the angels form rows before their Lord?" The people asked, "How do the angels form rows before their Lord?" He, peace and blessings be upon him, replied: "They complete the front rows first and stand close together in the rows."

It is narrated from Hazrat Abu Huraira that the Messenger of Allah, peace and blessings be upon him, said: "Straighten your rows and perform bowing and prostration in a good manner."