Leviticus 23:15

“And ye shall count unto you from the morrow after the sabbath, etc.] Not the seventh day sabbath in the passover week, nor the whole feast of unleavened bread, but the first day of it, which was an holy convocation, a sabbath in which no servile work was to be done, (<032307>Leviticus 23:7); and it was from the day after this, even the sixteenth of Nisan, that the following count was to be made; so the Targum of Jonathan, after the first feast day of the passover: and Josephus f808 is very clear in it, that Pentecost, or the feast of weeks, was the fiftieth day from the sixteenth of Nisan, when the above offerings were made: from the day that ye brought the sheaf of the wave offering; which…”

“FEAST OF PENTECOST. (Lev 23:15-22) ye shall count unto you from the morrow after the sabbath--that is, after the first day of the passover week, which was observed as a Sabbath.”

“These verses contain a distinct command regarding the religious services immediately connected with the grain harvest, given by anticipation against the time when the people were to possess the promised land. Leviticus 23:10 Sheaf - The original word, “omer”, means either a sheaf Deuteronomy 24:19; Ruth 2:7, or a measure Exodus 16:16. Our version is probably right in this place. The offering which was waved Leviticus 7:30 was most likely a small sheaf of barley, the grain which is first ripe. The first fruits of the wheat harvest were offered seven weeks later in the loaves of Pentecost. See Leviticus 23:15-17. The two offerings thus figure the very commencement and the completion of the…”

“From the morrow - From the sixteenth day of the month, and the second day of the feast of unleavened bread inclusively. Leviticus 23:16”

“23:15-21 Israel was to start the count of seven full weeks on the first day of the Festival of Unleavened Bread. The fiftieth day marked the beginning of the Festival of Harvest (the New Testament name of “Pentecost” is derived from the Greek word for “fifty”). For this festival the people were to offer the first portions of the wheat harvest. Each person was also required to take three quarts of fine flour and bake two loaves of yeast bread. These offerings were then presented to the priest officiating at the sanctuary. See also study note on Exod 23:16.”

“Lev 23:10, Lev 23:11, Lev 25:8; Exo 34:22; Deu 16:9, Deu 16:10 Leviticus 23:16”

“The law for the special observance of the feast of Harvest ( Exo 23:16) is added here without any fresh introductory formula, to show at the very outset the close connection between the two feasts. Seven whole weeks, or fifty days, were to be reckoned from the day of the offering of the sheaf, and then the day of first-fruits ( Num 28:26) or feast of Weeks ( Exo 34:22; Deu 16:10) was to be celebrated. From this reckoning the feast received the name of Pentecost (ἡ πεντηκοστή, Act 2:1). That שׁבּתות ( Lev 23:15) signifies weeks, like שׁבעות in Deu 16:9, and τὰ σάββατα in the Gospels (e.g., Mat 28:1), is evident from the predicate תּמימת, "complete," which would be quite unsuitable if…”