وَلَا يَزِيدُ عَلَى هَذَا فِي الْقَعْدَةِ الْأُولَى.
Meaning: Do not add anything beyond this in the first sitting.
In a three- or four-rakah prayer, the first sitting follows the second rakah. After the tashahhud, one proceeds to the next rakah; the usual place for salawat and subsequent supplication is the final sitting.