1 Samuel 25:41
And she arose, and bowed herself on her face to the earth, and said, Behold, let thine handmaid be a servant to wash the feet of the servants of my lord. And she arose, and bowed herself on her face to the earth, and said, Behold, let thine handmaid be a servant to wash the feet of the servants of my lord.
The verse records Abigail accepting David as husband, becoming his second wife after Michal his first wife. In response to David's request she arose and bowed herself on her face to the earth and offered to be a servant to wash the feet of the servants of her lord, an act of deep humility and willingness to serve.
Her offer expresses submission to David, not an act of hospitality. The word for servant in her self-description is common Eastern polite speech of an inferior to a superior, not chattel slavery, since the Hebrew noun most often means deferential address of inferiors to superiors or of equals to equals, or political subordination of lower to higher rank, so its use does not prove bought involuntary servitude. Washing the feet of equals is regarded as an act of humility, but Christ went further when He washed feet, taking the place of a servant of His own servants.