On Shavuot we celebrate receiving the Torah and we read the Book of Ruth; to this practice there is a hint. There are 7 commandments that apply to all humanity, and Ruth in gematria (numerical value) is 606. Added together these numbers make 613 – the number of commandments. Prior to receiving the Torah, we were obligated in the universal 7 commandments, after receiving the Torah, we were given another 606 commandments – hinted to in the name Ruth.