Sa'id ibn al-Musayyib سعيد بن المسيب بن حزن أبو محمد القرشي · The Book of Salah

"I heard Sa'eed bin Jubair say: 'I saw 'Abdullah bin 'Umar pray in Jam'; he made the Iqamah and prayed Maghrib, three Rak'ahs, then he prayed 'Isha', two Rak'ahs, then he said: 'This is what I saw the Messenger of Allah (ﷺ) do in this place.'"