Sawda bint Zamʿa was the first woman the Prophet ﷺ married after Khadija’s death; she had emigrated to Abyssinia with her first husband. In her later years she gave her day to ʿAʾisha, and the Prophet ﷺ divided his time accordingly (al-Bukhari 5212).
Sawda comes from the root s-w-d, which gives aswad (“black”) and sawad (“the mass, the majority of people”), but also sayyid (“chief, noble”) and siyada (“sovereignty”). Lexicographers also record sawda as the name of ground covered with black stones. The name is given in memory of Sawda bint Zamʿa, a Mother of the Believers.
And they both raced to the door, and she tore his shirt from the back, and they found her husband at the door. She said, "What is the recompense of one who intended evil for your wife but that he be imprisoned or a painful punishment?"
It has been made permissible for you the night preceding fasting to go to your wives [for sexual relations]. They are a clothing for you and you are a clothing for them. Allāh knows that you used to deceive yourselves, so He accepted your repentance and forgave you. So now, have relations with them and seek that which Allāh has decreed for you [i.e., offspring]. And eat and drink until the white thread of dawn becomes distinct to you from the black thread [of night]. Then complete the fast until the night [i.e., sunset]. And do not have relations with them as long as you are staying for worship in the mosques. These are the limits [set by] Allāh, so do not approach them. Thus does Allāh make clear His verses [i.e., ordinances] to the people that they may become righteous.