Narrated 'Aishah:

The Messenger of Allah ﷺ never touched the hand of woman, but he received the oath of allegiance from her. When he received the oath of allegiance from her, she gave it to him, and he said: Go, I have received your oath of allegiance.

حَدَّثَنَا أَحْمَدُ بْنُ صَالِحٍ، حَدَّثَنَا ابْنُ وَهْبٍ، حَدَّثَنِي مَالِكٌ، عَنِ ابْنِ شِهَابٍ، عَنْ عُرْوَةَ، أَنَّ عَائِشَةَ، رضى الله عنها أَخْبَرَتْهُ عَنْ بَيْعَةِ، رَسُولِ اللَّهِ ﷺ النِّسَاءَ قَالَتْ مَا مَسَّ رَسُولُ اللَّهِ ﷺ يَدَ امْرَأَةٍ قَطُّ إِلاَّ أَنْ يَأْخُذَ عَلَيْهَا فَإِذَا أَخَذَ عَلَيْهَا فَأَعْطَتْهُ قَالَ
" اذْهَبِي فَقَدْ بَايَعْتُكِ " .