The Messenger of Allah (ﷺ) used to say in his prayer, after the tashahhud: "The best of word is the word of Allah (SWT) and the best of guidance is the guidance of Muhammad (ﷺ)."
Sunan an-Nasa'i Book 13, Hadith 133
← Previous Hadith "I heard Abu Hurairah say: 'The Messenger of Allah (ﷺ) said: When one of you recites the tashahhud, let him seek refuge with Allah (SWT) from our things: From the torment of hell, from the torment of the grave, from the trials of life and death and from the evils of the Dajjal. Then let him pray for himself asking whatever he wants.'"

Sunan an-Nasa'i Book 13, Hadith 132 Next Hadith → He saw a man praying (And his bowing and prostration) were lacking. Hudhaifah said to him: 'For how long have you been praying like this?' He said: "For forty years.' He said: 'You have not been praying for forty years and if you die praying like this, you will have died following a path other than the path of Muhammad (ﷺ). Then he said: 'It is possible for a man to pray briefly, but still do it properly."

Sunan an-Nasa'i Book 13, Hadith 134