He shall receive the blessing - Perhaps alluding to Obed-edom, at whose house the ark had been lodged, and on whom God had poured out especial blessings.
And righteousness - Mercy: every kind of necessary good. It is the mercy of God that crowns the obedience and fidelity of good men. For what made them good and faithful? God's mercy. What crowns their fidelity? God's mercy.
He shall receive the blessing from the Lord - literally, “He shall bear away a blessing from Yahweh.” The blessing here referred to means His favor and friendship. He shall be recognized and treated as His. In other words, God bestows His favor on those who possess the character here referred to.
And righteousness from the God of his salvation - He shall be regarded and treated as righteous. Or, he shall obtain the divine approval as a righteous person. The idea of the psalmist would seem to be, not that he would obtain this as if it were a gift, but that he would obtain the divine “approval” of his character as righteous; he would be recognized and dealt with as a righteous man. He would come to God with “clean hands and a pure heart” Psalm 24:4, and would be welcomed and treated as a friend of God. The wicked and the impure could not hope to obtain this; but he who was thus righteous would be treated according to his real character, and would meet with the assurances of the divine favor. It is as true now as it was in the days of the psalmist, that it is only the man who is in fact upright and holy that can obtain the evidences of the divine approval. God will not regard one who is living in wickedness as a righteous man, nor will he admit such a man to His favor here, or to His dwelling-place hereafter.