Ali bin Mudrik narrates from Tamim bin Tarafah, who narrates from Sayyiduna Jabir bin Samurah (may Allah be pleased with him); he said: We prayed with the Messenger of Allah (peace and blessings be upon him), and he signalled to us to sit down, so we sat. Then he said: "What prevents you from forming rows the way the angels form rows in the presence of the Most Merciful?" The people said: O Messenger of Allah, how do they form rows? He said: "They complete the front rows and stand close together in the rows, standing firmly close together."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1803