Deuteronomy 33:25 Thy shoes shall be iron and brass; and as thy days, so shall thy strength be.
“Whatever thy trials or difficulties may be, I shall always give thee grace to support thee under and bring thee through them.” According to thy days – all circumstances and vicissitudes, so shall thy Rest be – while faithful to thy God no evil shall touch thee; thy days shall increase, and thy quiet be lengthened out. This is an unfailing promise of God: “I will keep him in perfect peace whose mind is stayed upon me, because he trusteth in me;” therefore “trust ye in the Lord for ever, for in the Lord Jehovah is everlasting strength;” Isa 26:4. So shall thy strength be, i.e. thy strength shall not be diminished with thine age, but thou shalt have the rigour of youth even in thine old age; thy tribe shall grow stronger and stronger. Isa 40:29; 41:10; 1Co 10:13; 2Co 12:9-10; Eph 6:10; Php 4:13
Deuteronomy 33:27 The eternal God is thy refuge, and underneath are the everlasting arms: and he shall thrust out the enemy from before thee; and shall say, Destroy them.