28:20-22 Jacob made a solemn vow on this occasion. In this observe, 1. Jacob's faith. He trusts that God will be with him, and will keep him; he depends upon it. 2. Jacob's moderation in his desires. He asks not for soft clothing and dainty meat. If God give us much, we are bound to be thankful, and to use it for him; if he gives us but little, we are bound to be content, and cheerfully to enjoy him in it. 3. Jacob's piety, and his regard to God, appear in what he desired, that God would be with him, and keep him. We need desire no more to make us easy and happy. Also his resolution is, to cleave to the Lord, as his God in covenant. When we receive more than common mercy from God, we should abound in gratitude to him. The tenth is a fit proportion to be devoted to God, and employed for him; though it may be more or less, as God prospers us, 1Co 16:2. Let us then remember our Bethels, how we stand engaged by solemn vows to yield ourselves to the Lord, to take him for our God, and to devote all we have and are to his glory!So that I come again to my father's house in peace,.... In safety from Esau, and all other enemies, as God promised him he should:

then the Lord shall be my God; not as if he should not be his God if he did not do all this for him; which would savour not only of a mercenary spirit, but of great impiety; neither of which were to be found in Jacob: but the meaning is, that he should not only continue to own him as his God, and to worship him, but having fresh obligations upon him, should be stirred up more eagerly and devoutly to serve him in a very singular way and manner, and particularly by doing what is expressed in Genesis 28:22. Some think he has respect to the Messiah, owning him to be the true God with the Father and the blessed Spirit, who had appeared to Abraham, and was the fear of Isaac, and whom Jacob now owned as his God: this receives some confirmation from the Targum of Jonathan, which begins the paragraph thus,"if the Word of the Lord will be my help, &c. then the Lord shall be my God.''