Leviticus 23:15

Ye shall count... from the morrow after the sabbath. — That is, from the day following the first day of holy convocation, which was a rest day. As this was the fifteenth of Nisan, the counting began from the sixteenth (see Leviticus 23:11), the day on which the omer of the first-fruits was presented to the Lord.

Seven sabbaths shall be complete. — Better, seven weeks shall be complete. That is, seven entire weeks, making forty-nine days. The expression sabbath denotes here a week, hence the parallel passage substitutes the word week, viz., “seven weeks shalt thou number unto thee” (Deuteronomy 16:9), The same usage is to be found in the New Testament. Thus the passage rendered in the Authorised version, “the first day of the week,” is “the first day of the sabbath” (Matthew 28:1); and “I fast twice in the week” (Luke 18:12), is, “I fast twice in the sabbath.” In accordance with the injunction here given, the Jews to the present day begin to count the forty-nine days at the conclusion of the evening service on the second day of Passover, and pronounce the following blessing every evening of the forty-nine days: “Blessed art thou, O Lord our God, King of the universe, who hast sanctified us with thy commandments, and hast enjoined us to count the omer. This is the first day of the omer. May it please thee, O Lord our God, and the God of our fathers, to rebuild the sanctuary speedily in our days, and give us our portion in thy Law.