Two are a congregation
حَدَّثَنَا نَصْرُ بْنُ عَلِيٍّ، حَدَّثَنَا أَبِي، حَدَّثَنَا شُعْبَةُ، عَنْ عَبْدِ اللَّهِ بْنِ الْمُخْتَارِ، عَنْ مُوسَى بْنِ أَنَسٍ، عَنْ أَنَسٍ، قَالَ صَلَّى رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ بِامْرَأَةٍ مِنْ أَهْلِهِ، وَبِي، فَأَقَامَنِي عَنْ يَمِينِهِ وَصَلَّتِ الْمَرْأَةُ خَلْفَنَا .
It was narrated that Anas said: “The Messenger of Allah (ﷺ) led a woman of his household and myself in prayer. I stood to his right and the woman stood behind us.”