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).
فِي قَوْلِهِ تَعَالَى {وَلاَ يَعْصِينَكَ فِي مَعْرُوفٍ} قَالَ إِنَّمَا هُوَ شَرْطٌ شَرَطَهُ اللَّهُ لِلنِّسَاءِ