Exodus 23:25

And ye shall serve the Lord your God
And him only, who had brought them out of Egypt, and done so many great and good things for them at the Red sea, and now in the wilderness; by which he appeared to be the true Jehovah, the one and only living God, and to be their God in covenant, who had promised them much, and had performed it; and therefore was in a special and peculiar manner their God, and they were under the highest obligations to serve and worship him in the way and manner he directed them to:

and he shall bless thy bread and thy water;
and make them nourishing and refreshing to them, and preserve them thereby in health, as well as prosper and succeed them, and increase their worldly substance:

and I will take sickness away from the midst of thee;
the stroke of bitterness, or the bitter stroke, as the Targum of Jonathan, any grievous disease, which is bitter and distressing; signifying that there should be none among them, but that they should be healthful, and free from distempers and diseases.