'Heave offering' in the Bible

Then there shall be a place which the LORD your God shall choose to cause his name to dwell there; there shall you bring all that I command you; your burnt offerings, and your sacrifices, your tithes, and the heave offering of your hand, and all your choice offerings which you vow unto the LORD:

You may not eat within your gates the tithe of your grain, or of your wine, or of your oil, or the firstlings of your herds or of your flock, nor any of your offerings which you vow, nor your freewill offerings, or heave offering of your hand: