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).
Narrated Um Atiyya:
We gave the Pledge of allegiance to the Prophet (ﷺ) and he recited to me the verse (60.12). That they will not associate anything in worship with Allah (60.12). And he also prevented us from wailing and lamenting over the dead. A woman from us held her hand out and said, "Such-and-such a woman cried over a dead person belonging to my family and I want to compensate her for that crying" The Prophet did not say anything in reply and she left and returned. None of those women abided by her pledge except Um Sulaim, Um Al-`Ala', and the daughter of Abi Sabra, the wife of Al-Mu`adh or the daughter of Abi Sabra, and the wife of Mu`adh.
Aisha said, "Allah's Messenger (ﷺ) used to test all the believing women who migrated to him, with the following Verse:-- "O Prophet! When the believing Women come to you, to give the pledge of allegiance to you." (60.12) `Urwa's uncle said, "We were informed when Allah ordered His Apostle to return to the pagans what they had given to their wives who lately migrated (to Medina) and we were informed that Abu Basir..." relating the whole narration.