Isaiah 58:14 - Joseph Benson’s Commentary on the Old and New Testaments

Then shalt thou delight thyself in the Lord This refers to the preceding verse, as if he had said, If thou wilt delight thyself in the sabbath, then thou shalt delight in the God of the sabbath, namely, in his goodness and faithfulness to thee, and in the assurance of his love and favour. I will cause thee to ride, &c. Thou shalt be above the reach of danger. And feed thee with the heritage of Jacob Thou shalt enjoy the good of the land of Canaan, which God promised as a heritage to Jacob and his seed, Genesis 35:12. Or, figuratively understood, thou shalt enjoy temporal as well as spiritual blessings. The Lord will withhold from thee no manner of thing which he sees to be for thy prosperity and happiness. For the mouth of the Lord hath spoken it The promise is sure, and shall infallibly be fulfilled, having proceeded from the mouth of him who cannot lie.