‘Abdul-Muhaimin bin ‘Abbas bin Sahl bin Sa’d As-Sa’idi narrated from his father, from his grandfather, that the Messenger of Allah ﷺ said one Taslim to the front. (Using translation from Ibn Mājah 918)
أَنَّ النَّبِيَّ ﷺ كَانَ يُسَلِّمُ تَسْلِيمَةً وَاحِدَةً