Leviticus 23:11

On the morrow after the sabbath— By the sabbath here, is to be understood, not the weekly sabbath, but the first day of unleavened bread, spoken of Leviticus 23:7 which is called the sabbath, or rest, because it was a festival, whereon they were to rest from all servile labour, as was usual on their weekly sabbath: and this is common, says Strabo, both to Greeks and Barbarians; to keep their holidays with a festival remission of their labours.

The Hebrew, says Dr. Beaumont, is morrow of the sabbath; meaning not the ordinary sabbath, but the sabbath of the passover, which was always the 15th of Nisan, or March, the first day of unleavened bread, called the feast, Numbers 28:17 on which days were sabbatisms; (Leviticus 23:24; Leviticus 23:32; Leviticus 23:39.) so the morrow after was always the 16th of Nisan.