Mishkat al-Masabih 4048
Umaima daughter of Ruqaiqa said:
I swore allegiance to the Prophet along with some women and he said to us, "As far as you are able and are capable.” I said, "God and His Messenger are more merciful to us than we are to ourselves.” I asked God's Messenger to ratify our covenant, meaning to shake hands with us, but he replied, "I say the same to a hundred women as I do to one.” 

…transmitted it. The name of the collection of traditions where this is found is omitted. Cf. Nasa’i, Bai'a , 18; Ibn Majah, Jihad , 43; Ahmad b. Hanbal, vi, p. 357; Malik, Muwatta' , Bai'a , 1.
وَعَن أُميمةَ بنت رقيقَة قَالَتْ: بَايَعْتُ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي نِسْوَةٍ فَقَالَ لَنَا: «فِيمَا اسْتَطَعْتُنَّ وَأَطَقْتُنَّ» قُلْتُ: اللَّهُ وَرَسُولُهُ أَرْحَمُ بِنَا مِنَّا بِأَنْفُسِنَا قُلْتُ: يَا رَسُولَ اللَّهِ بَايِعْنَا تَعْنِي صَافِحْنَا قَالَ: «إِنَّمَا قَوْلِي لِمِائَةِ امْرَأَةٍ كَقَوْلِي لِامْرَأَةٍ وَاحِدَةٍ» . رَوَاهُ التِّرْمِذِيُّ وَالنَّسَائِيُّ وَابْنُ مَاجَهْ وَمَالِكٌ فِي الْمُوَطَّأ