Leviticus 23:15-17

15‘1You shall also count for yourselves from the day after the Sabbath, from the day when you brought in the sheaf of the wave offering; there shall be seven complete Sabbaths.

16You shall count fifty days to the day after the seventh Sabbath; then you shall present a 2new grain offering to the Lord.

17You shall bring in from your dwelling places two loaves of bread as a wave offering, made of 3two-tenths of an ephah; they shall be of a fine flour, baked 4with leaven as first fruits to the Lord.