Once Allah's Messenger (ﷺ) came out while Bilal was accompanying him. He went towards the women thinking that they had not heard him (i.e. his sermon). So he preached them and ordered them to pay alms. (Hearing that) the women started giving alms; some donated their ear-rings, some gave their rings and Bilal was collecting them in the corner of his garment.
Sahih al-Bukhari Book 3, Hadith 40
← Previous Hadith Allah's Messenger (ﷺ) said "Three persons will have a double reward:

1. A Person from the people of the scriptures who believed in his prophet (Jesus or Moses) and then believed in the Prophet (ﷺ) Muhammad (i .e. has embraced Islam).

2. A slave who discharges his duties to Allah and his master.

3. A master of a woman-slave who teaches her good manners and educates her in the best possible way (the religion) and manumits her and then marries her."

Sahih al-Bukhari Book 3, Hadith 39 Next Hadith → I said: "O Allah's Messenger (ﷺ)! Who will be the luckiest person, who will gain your intercession on the Day of Resurrection?" Allah's Messenger (ﷺ) said: O Abu Huraira! "I have thought that none will ask me about it before you as I know your longing for the (learning of) Hadiths. The luckiest person who will have my intercession on the Day of Resurrection will be the one who said sincerely from the bottom of his heart "None has the right to be worshipped but Allah."

Sahih al-Bukhari Book 3, Hadith 41