From the first of your dough, you are to lift up a cake as a contribution; offer it just like an offering from the threshing floor.

Exodus 34:26
Bring the best of the firstfruits of your soil to the house of the LORD your God. You must not cook a young goat in its mother's milk."

Leviticus 23:14
You must not eat any bread or roasted or new grain until the very day you have brought this offering to your God. This is to be a permanent statute for the generations to come, wherever you live.

Numbers 15:21
Throughout your generations, you are to give the LORD an offering from the first of your dough.

Deuteronomy 14:22
You must be sure to set aside a tenth of all the produce brought forth each year from your fields.

Deuteronomy 14:23
And you are to eat a tenth of your grain, new wine, and oil, and the firstborn of your herds and flocks, in the presence of the LORD your God at the place He will choose as a dwelling for His Name, so that you may learn to fear the LORD your God always.

Deuteronomy 16:13
You are to celebrate the Feast of Tabernacles for seven days after you have gathered the produce of your threshing floor and your winepress.

Ezekiel 44:30
The best of all the firstfruits and of every contribution from all your offerings will belong to the priests. You are to give your first batch of dough to the priest, so that a blessing may rest upon your homes.

You shall offer up a cake of the first of your dough for an heave offering: as you do the heave offering of the threshing floor, so shall you heave it.