It was narrated from Al'Irbad bin Sariyah that the Messenger of Allah ﷺ used to send Salah on the first row three times and on the second row once. (Using translation from Nasāʾī 817)
كَانَ رَسُولُ اللهِ ﷺ يُصَلِّي عَلَى الصَّفِّ الْمُقَدَّمِ ثَلَاثًا وَعَلَى الثَّانِي وَاحِدَةً