Deuteronomy 16:9

Seven weeks shalt thou number to thyself; when thou hast begun [to put] the sickle to the corn, thou shalt begin to number seven weeks.

Seven weeks shalt thou number unto thee: begin to number the seven weeks from such time as thou beginnest to put the sickle to the corn.

You shall count for yourselves seven weeks. From the time you begin to put the sickle to the standing grain you shall begin to count seven weeks.