1 Samuel 16:5

sanctify yourselves By the usual ceremonial purifications, such as washing the body and clothes, the outward symbols of spiritual preparation. See Genesis 35:2; Exodus 19:10 ff. The Sept. adds, "and rejoice with me this day."

And he sanctified, &c. In the case of Jesse's family Samuel super-intended the necessary purification himself. This gave him the opportunity of a private interview with them in Jesse's house, at which David's anointing took place. The sacrifice appears to have followed afterwards.