Sunan al-Nasa'i The Book of Leading the Prayer (Al-Imamah) Abdullah bin Mubarak عبد الله بن المبارك al-Sa'ib bin Hbysh السائب بن حبيش Ma'dan bin Abi Talha معدان بن أبي طلحة ويقال بن طلحة Swyd bin Nsr bin Swyd سويد بن نصر بن سويد Za'ida bin Qadama al-Thaqifi زائدة بن قدامة الثقفي “The Messenger of Allah (ﷺ) turned to face us when he stood up to pray, before he said Takbir, and said: ‘Make your rows straight and fill the gaps, for I can see you from behind my back.”‘ https://parallelquran.com/hadith/sunan-al-nasai-847/