Musnad Ahmad

It is narrated from Sayyidah Zainab that once the Prophet (peace be upon him) said: Give charity, even if it is from your jewelry. She says that her husband, Abdullah bin Mas'ud, was light-handed and financially weak. I said to him, "Is it possible that I give charity to you and to my orphan nephews?" He said, "Ask the Prophet (peace be upon him)." So I went to the Prophet (peace be upon him), and at the door of his house, there was another Ansari woman whose name was also Zainab, who had come to ask the same question from the Prophet (peace be upon him). Sayyiduna Bilal came out, so we said to him, "Go and ask the Prophet (peace be upon him) about this issue, and do not tell him who we are." So he went to the Prophet (peace be upon him). The Prophet (peace be upon him) asked, "Who are those two?" He replied that both are named Zainab. The Prophet (peace be upon him) asked, "Which Zainab?" He replied, "One is the wife of Abdullah bin Mas'ud and the other is Zainab Ansariyyah." The Prophet (peace be upon him) said: "Yes, both will receive reward, and a double reward—one reward for kinship and one for giving charity."

The previous hadith is also narrated through this second chain of transmission.

Abd al-Razzaq narrated to us, he said: Sufyan informed us, from al-A'mash, from Shaqiq, from Amr ibn al-Harith ibn al-Mustaliq, from Zaynab, she said: The Messenger of Allah, peace and blessings be upon him, said: "Give charity, O assembly of women," and he mentioned it.