Numbers 15:21
"Of the first of your dough ye shall give unto the LORD an heave offering in your generations."
Cross References (ranked by relevance)
Exodus 29:28
And it shall be Aaron’s and his sons’ by a statute for ever from the children of Israel: for it is an heave offering: and it shall be an heave offering from the children of Israel of the sacrifice of their peace offerings, even their heave offering unto the LORD.
Numbers 18:26
Thus speak unto the Levites, and say unto them, When ye take of the children of Israel the tithes which I have given you from them for your inheritance, then ye shall offer up an heave offering of it for the LORD, even a tenth part of the tithe.