Jabir b. Samura said

God’s Messenger came out to us and when he saw us sitting in circles he said, “How is it that I see you in separate companies?” On another occasion he came out to us and said, “Why do you not draw yourselves up in rows as the angels do in the presence of their Lord?” We asked, "Messenger of God, how do the angels draw themselves up in rows in the presence of their Lord?” He replied, "They make the first rows complete and keep close together in the row.” Muslim transmitted it.