وَتَعْيِينُ الْقِرَاءَةِ فِي الْأُولَيَيْنِ مِنَ الْفَرْضِ
The matn separately makes the first two rak'ahs of a Fard prayer the designated place for the required recitation.
A person should not deliberately leave the Surah addition in the first two rak'ahs and move it to the later rak'ahs. If this happens forgetfully, the missed Wajib placement is repaired according to the relevant recovery rule and Sujud al-Sahw.