Salam in the prayers

1114. While a person sits after reciting Tashahhud in the last Rak'at, and his body is tranquil, it is Mustahab to say:Assalamu ‘Alayka Ayyuhan Nabiyyu wa Rahmatullahi wa Barakatuh.
Then it is obligatory to say: Assalamu Alaykum Wa Rahmatullahi Wa Barakatuh.

Or alternatively, he can say: Assalamu Alayna Wa Ala Ibadi llahis Salihin.