Leviticus 23:15-17

“ ‘Count seven full weeks from the morning after the Sabbath. (This is the Sabbath that you bring the bundle of grain to present as an offering.) On the fiftieth day, the first day after the seventh week, you will bring a new grain offering to the LORD. On that day bring two loaves of bread from your homes to be presented as an offering. Use yeast and four quarts of flour to make those loaves of bread; they will be your gift to the LORD from the first wheat of your harvest.