Deuteronomy 14:23

And make a feast before the Lord your God, in the place which is to be marked out, where his name will be for ever, of the tenth part of your grain and your wine and your oil, and the first births of your herds and your flocks; so that you may have the fear of the Lord your God in your hearts at all times.

Deuteronomy 4:10

That day when you were waiting before the Lord your God in Horeb, and the Lord said to me, Make all the people come together, so that hearing my words they may go in fear of me all the days of their life on earth and give this teaching to their children.

Deuteronomy 12:5-7

But let your hearts be turned to the place which will be marked out by the Lord your God, among your tribes, to put his name there;

Deuteronomy 12:17-18

In your towns you are not to take as food the tenth part of your grain, or of your wine or your oil, or the first births of your herds or of your flocks, or anything offered under an oath, or freely offered to the Lord, or given as a lifted offering;

Deuteronomy 15:19-20

All the first males to come to birth in your herd and your flock are to be holy to the Lord your God: the first birth of your ox is not to be used for work, the wool of your first lamb is not to be cut.

Treasury of Scripture Knowledge

Summary

And thou shalt eat before the LORD thy God, in the place which he shall choose to place his name there, the tithe of thy corn, of thy wine, and of thine oil, and the firstlings of thy herds and of thy flocks; that thou mayest learn to fear the LORD thy God always.

Eat before

The firstlings

General references

Bible References

Eat before

Deuteronomy 12:5
But let your hearts be turned to the place which will be marked out by the Lord your God, among your tribes, to put his name there;

The firstlings

Deuteronomy 15:19
All the first males to come to birth in your herd and your flock are to be holy to the Lord your God: the first birth of your ox is not to be used for work, the wool of your first lamb is not to be cut.

General references

Leviticus 27:30
And every tenth part of the land, of the seed planted, or of the fruit of trees, is holy to the Lord.
John 2:14
And there in the Temple he saw men trading in oxen and sheep and doves, and he saw the changers of money in their seats:

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain