Leviticus 23:16-17, 20

You shall count fifty days to the day after the seventh Sabbath. Then you shall present a grain offering of new grain to the LORD. You shall bring from your dwelling places two loaves of bread to be waved, made of two tenths of an ephah. They shall be of fine flour, and they shall be baked with leaven, as firstfruits to the LORD.

And the priest shall wave them with the bread of the firstfruits as a wave offering before the LORD, with the two lambs. They shall be holy to the LORD for the priest.