"At the end of the last two rak'ahs of the prayer, the Prophet ﷺ would move his left foot forward and sit on his left buttock, Mutawarrikan, then he would say the taslim.
كَانَ النَّبِيُّ ﷺ إِذَا كَانَ فِي الرَّكْعَتَيْنِ اللَّتَيْنِ تَنْقَضِي فِيهِمَا الصَّلاَةُ أَخَّرَ رِجْلَهُ الْيُسْرَى وَقَعَدَ عَلَى شِقِّهِ مُتَوَرِّكًا ثُمَّ سَلَّمَ
"At the end of the last two rak'ahs of the prayer, the Prophet ﷺ would move his left foot forward and sit on his left buttock, Mutawarrikan, then he would say the taslim. (Using translation from Nasāʾī 1262)
كَانَ النَّبِيُّ ﷺ «إِذَا كَانَ فِي الرَّكْعَتَيْنِ اللَّتَيْنِ تَنْقَضِي فِيهِمَا الصَّلَاةُ أَخَّرَ رِجْلَهُ الْيُسْرَى وَقَعَدَ عَلَى شِقِّهِ مُتَوَرِّكًا ثُمَّ سَلَّمَ»