Charles H. Spurgeon on Psalms 94:13

To give him rest. This is the end of God's teaching, that his servant may wait in patience, unmoved by, safe from, the days of evil (comp. Ps 49:5) seeing the evil all round lifting itself up, but seeing also the secret, mysterious retribution, slowly but surely accomplishing itself. In this sense the "rest" is the rest of a calm, self possessed spirit, as Isa 7:4 30:15 32:17 57:20; and "to give him" signifies "that thou mayest give him." J. J. S. Perowne.