Jami` at-Tirmidhi Book 47, Hadith 359
“Umm Salamah Al-Ansariyyah narrated to us, she said: ‘A woman said: “What is this Ma’ruf for which we are not to disobey in?” He (pbuh) said: “” I said: “O Messenger of Allah! Verily Banu so-and-so comforted me in the case of my uncle, and I must reciprocate for them.’ But he refused to allow me. So I asked him again numerous times, then he permitted me to reciprocate for them. So after reciprocating for the, I did not wail for anyone else until this time. And there does not remain a woman except that she has wailed besides me.’”
“The Messenger of Allah would not have examined (the women) except for the Ayah in which Allah said: When believing come to you pledging to you.” Ma’mar said: “Ibn Tawus informed me from his father who said: ‘The hand of the Messenger of Allah did not touch the hand of a women he had not acquired.’”
from Ibn Abbas, regarding the saying of Allah, the Most High: When believing women come to you as emigrants, examine them. He said: “When a woman come to the Prophet to accept Islam, she would have to take and an oath by Allah: ‘I have not left out of anger with my husband, I have not left except out of love for Allah and His Messenger.’”]