And in the narration of Ahmad:

'The Prophet (ﷺ) taught him at-Tashahhud and ordered him to teach it to the people.'

وَلِأَحْمَدَ : { أَنَّ اَلنَّبِيَّ ‏- صلى الله عليه وسلم ‏-عَلَّمَهُ اَلتَّشَهُّد , وَأَمَرَهُ أَنْ يُعَلِّمَهُ اَلنَّاسَ } .‏ [1]‏