Abraham is important as he is considered the father of the Jewish nation.
The same as its significance today. The origin of the Shabbat is in the Torah (Genesis ch.2, Leviticus ch.23, Exodus ch.20 and many other passages). The Sabbath is a day blessed by God (Genesis ch.2), which He gave it to the Israelites as a treasured gift to be cherished (Talmud, Beitzah 15b). It is a day of rest (Exodus ch.20, ch.31), and a day of strengthening ties with the family, the community, and with God.
See also:
People should recognize and worship only one god.
Among other differences, Judaism is monotheistic.
God is One.
Answer: The Vedas allow for the worship of many gods, while the Ten Commandments require followers to worship only one.