Numbers 18:26

Thus shalt thou speak unto the Levites and say unto them, When ye take the tithes from the sons of Israel which I have given you from them for your inheritance, then ye shall present a tithe of the tithes as an offering unto the LORD.

Nehemiah 10:38

And that the priest, the son of Aaron, shall be with the Levites when the Levites receive tithes; and the Levites shall offer the tithe of the tithes in the house of our God, to the chambers, in the treasure house.

Numbers 18:21

And, behold, I have given the sons of Levi all the tithes in Israel for an inheritance, for their ministry because they serve in the ministry of the tabernacle of the testimony.

Treasury of Scripture Knowledge

Summary

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.

Then ye shall

A tenth part

General references

Bible References

Then ye shall

Numbers 18:19
All the heave offerings of the holy things, which the sons of Israel offer unto the LORD, I have given for thee and for thy sons and for thy daughters with thee, by a perpetual statute; it is a covenant of salt for ever before the LORD for thee and for thy seed with thee.

A tenth part

Nehemiah 10:38
And that the priest, the son of Aaron, shall be with the Levites when the Levites receive tithes; and the Levites shall offer the tithe of the tithes in the house of our God, to the chambers, in the treasure house.

General references

Numbers 15:21
Of the firstfruits of your dough ye shall give unto the LORD an offering in your generations.