In a second giving of these in instructions from the book of Deuteronomy (the name which actually means “second law,” or “repetition of the law), we read these instructions for the Feast of the Weeks:
You shall count seven weeks for yourself; you shall begin to count seven weeks from the time you begin to put the sickle to the standing grain. Then you shall celebrate the Feast of Weeks to the LORD your God with a tribute of a freewill offering of your hand, which you shall give just as the LORD your God blesses you. (Deuteronomy 16:9-11 NAS)
The words that we have written in our Bibles as “seven weeks,” are actually “seven sevens.” That is, we could write the instructions as, “You shall count out seven sevens for yourself.” The Hebrew phrase for this is shiv’a shavuot, which is where the Jewish community, who still celebrate this holy day, get their name for the day as Shavuot.