11. The Book of the Commencement of the Prayer - كتاب الافتتاح
68) Chapter: Recitation in the two rak'ahs after maghrib
It was narrated that Ibn Umar said:
"I watched the Messenger of Allah (ﷺ)- twenty times- reciting in the two rak'ahs after maghrib 'Say: O you disbelievers' and 'Say: He is Allah, (the) One.'"