Deuteronomy 16:9
Seven weeks shall you number to you: begin to number the seven weeks from such time as you begin to put the sickle to the corn.
Torrey's Topical Textbook—AKJV

Mark 4:29
But when the fruit is brought forth, immediately he puts in the sickle, because the harvest is come.
Torrey's Topical Textbook—AKJV