Isaiah 26:4

Trust ye in the Lord for ever
In the Word of the Lord for ever and ever, as the Targum again; that is, at all times, in every state and condition, in times of affliction, temptation, and darkness; for he will support under, and in his own time deliver out of every trouble, and cause all things to work to gether for good; and trust in him always, for everything, for all temporal blessings, and for all spiritual ones, and for eternal life and happiness; for he has them, has promised them, and will give them: for in the Lord JEHOVAH [is] everlasting strength;
Christ is the Lord JEHOVAH, which is, and was, and is to come, self-existent, eternal, and immutable; and in him is strength, as well as righteousness for his people; and that for everything it is wanted for, to bear up under temptations and afflictions, to withstand every spiritual enemy, to exercise every grace, and discharge every duty: and this strength is everlasting; it always continues in him, and is always to be had from him; he is the "eternal" God, who is the refuge of his people, and his "arms" of power and might "underneath" them are "everlasting": the words may be rendered, "for in Jah" is "Jehovah, the Rock of ages" ^F17; Jehovah the Son is in Jehovah the Father, according to ( John 10:38 ) ( 14:11 ) or "Jah Jehovah" is "the Rock of ages", so Vitringa; he is the "Rock" on which the church and every believer is built, against which "the gates of hell cannot prevail"; and he has been the Rock of his people in ages past, and will be in ages to come: or "of worlds"; this world, and that to come; and so it is explained in the Talmud ^F18, he that trusts in the Lord has a refuge in this world, and in the world to come.