In Psalm 132:10 the Psalmist prays: “For the sake of Your servant David, do not turn away the face of Your anointed one”
The salient principle here is that for the sake of ANOTHER who has gone before and who has found favor with God, the present ONE has the blessing: “For the sake of Your servant David”, “do not turn away the face of Your anointed.” The anointed one (the king) was to be blessed for the sake of David.
What we see here is an Old Testament foreshadowing of the Substitutionary Atonement of Jesus. Because of what Jesus (God’s Servant who was, in fact, of the line of David, Matt. 1:1) did on the cross for us, God will not turn away His face from US! Each of us has sinned and does not deserve to stand in the presence of God. But because of what Jesus did, we each have the opportunity to pray a prayer similar to the one found in Psalm 132:10: “Because of Your Servant Jesus, do not turn Your face away from ME!” It is God’s grace to us, for Jesus’ sake!