Why is salt used in sabbath?

Answer 1

The food at a Jewish seder all has symbolic meaning to remind them of Jewish slavery under the Egyptians and then freedom under the guidance of Moses. Salted water can be symbolic either of the salty tears shed by the Jewish slaves or the salt water of the Red Sea, through which they crossed to freedom. At a Jewish Passover seder, salted water is used to dip parsley or another green herb in before eating to symbolize the coming of spring and the perpetual renewal of life.