Psalms 15:5

Usury. Heb. neshek, “interest,” but not unlawful or excessive interest, that is, “usury,” as we would say. The Hebrews were forbidden to take interest of the poor, especially poor Israelites (Ex. 22:25; Lev. 25:35–37; Deut. 23:19), but were allowed to take interest of strangers (see Deut. 23:20). This distinction appears to have been drawn because the Hebrews were regarded as brethren in a nation. It would be unbrotherly to charge a brother interest. Obedience to this ethical ideal constitutes a high level of character.

Nor taketh reward. That is, he does not accept bribes. He does not enrich himself at the expense of the unfortunate. Taking a bribe is forbidden (see Ex. 23:8; Deut. 16:19; cf. Prov. 17:23). Good government exists only where there is impartial justice. Bribery destroys good government.

Never be moved. This is the answer, in brief finality, to the questions of v. 1. The man who has the traits of character exhibited in vs. 2–5 is fit to be the guest of God. Standing on a sure foundation, he can “never be moved.” “How firm a foundation!” (see Matt. 7:24, 25; cf. Ps. 16:8).

Such are the qualities of the true Christian in the sight of God and man.