Deuteronomy Chapter 16, Verse 9

9: 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.- edit KJV text
9: Thou shalt number unto thee seven weeks from that day, wherein thou didst put the sickle to the corn.— edit Douay text
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.— edit LXX text