Narrated `Urwa:
Aisha told me, "Allah's Messenger (ﷺ) used to examine them according to this Verse: "O you who believe! When the believing women come to you, as emigrants test them . . . for Allah is Oft- Forgiving, Most Merciful." (60.10-12) Aisha said, "When any of them agreed to that condition Allah's Apostle would say to her, 'I have accepted your pledge of allegiance.' He would only say that, but, by Allah he never touched the hand of any women (i.e. never shook hands with them) while taking the pledge of allegiance and he never took their pledge of allegiance except by his words (only).
Al-Hasan bin Muslim told me that
Ibn `Abbas had said, "I joined the Prophet, Abu Bakr, `Umar and `Uthman in the `Id ul Fitr prayers. They used to offer the prayer before the Khutba and then they used to deliver the Khutba afterwards. Once the Prophet (ﷺ) I came out (for the `Id prayer) as if I were just observing him waving to the people to sit down. He, then accompanied by Bilal, came crossing the rows till he reached the women. He recited the following verse: 'O Prophet! When the believing women come to you to take the oath of fealty to you . . . (to the end of the verse) (60.12).' After finishing the recitation he said, "O ladies! Are you fulfilling your covenant?" None except one woman said, "Yes." Hasan did not know who was that woman. The Prophet (ﷺ) said, "Then give alms." Bilal spread his garment and said, "Keep on giving alms. Let my father and mother sacrifice their lives for you (ladies)." So the ladies kept on putting their Fatkhs (big rings) and other kinds of rings in Bilal's garment." `Abdur-Razaq said, " 'Fatkhs' is a big ring which used to be worn in the (Pre-Islamic) period of ignorance.
Narrated `Aisha:
The Prophet (ﷺ) used to take the Pledge of allegiance from the women by words only after reciting this Holy Verse:--(60.12) "..that they will not associate anything in worship with Allah." (60.12) And the hand of Allah's Messenger (ﷺ) did not touch any woman's hand except the hand of that woman his right hand possessed. (i.e. his captives or his lady slaves).