"O Prophet! When believing women come to you to give you the Bai'a (pledge).. ." (V.60:12) Sahih al-Bukhari 4893
Arabic hadith text
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ، حَدَّثَنَا وَهْبُ بْنُ جَرِيرٍ، قَالَ حَدَّثَنَا أَبِي قَالَ، سَمِعْتُ الزُّبَيْرَ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، فِي قَوْلِهِ تَعَالَى {وَلاَ يَعْصِينَكَ فِي مَعْرُوفٍ} قَالَإِنَّمَا هُوَ شَرْطٌ شَرَطَهُ اللَّهُ لِلنِّسَاءِ.
Translation
Narrated Ibn `Abbas
Regarding the saying of Allah: 'And they will not disobey you in any just matter.' (60.12) That was one of the conditions which Allah imposed on The believing) women (who came to take the oath of allegiance to the Prophet).