'Harvest' in the Bible

“While the earth remains,Seedtime and harvest,And cold and heat,And summer and winter,And day and nightShall not cease.”

Now in the days of wheat harvest Reuben went and found mandrakes in the field, and brought them to his mother Leah. Then Rachel said to Leah, “Please give me some of your son’s mandrakes.”

At the harvest you shall give a fifth to Pharaoh, and four-fifths shall be your own for seed of the field and for your food and for those of your households and as food for your little ones.”