Leviticus 23:13-15

New International Version - UK

¹³ together with its grain offering of one fifth of an ephah^[a] of the finest flour mixed with olive oil – a food offering presented to the Lord, a pleasing aroma – and its drink offering of a quarter of a hin^[b] of wine. ¹⁴ You must not eat any bread, or roasted or new grain, until the very day you bring this offering to your God. This is to be a lasting ordinance for the generations to come, wherever you live.

The Festival of Weeks

¹⁵ ‘“From the day after the Sabbath, the day you brought the sheaf of the wave offering, count seven full weeks.