Leviticus 23:38

Beside the sabbaths of the LORD, and beside your gifts, and beside all your vows, and beside all your free-will-offerings, which ye give to the LORD.

Numbers 29:39

These things ye shall do to the LORD in your set feasts, besides your vows, and your free-will-offerings, for your burnt-offerings, and for your meat-offerings, and for your drink-offerings, and for your peace-offerings.

Genesis 2:2-3

And on the seventh day God ended his work which he had made; and he rested on the seventh day from all his work which he had made.

Exodus 20:8-11

Remember the sabbath-day to keep it holy.

Leviticus 19:3

Ye shall fear every man his mother and his father, and keep my sabbaths: I am the LORD your God.

Leviticus 23:3

Six days shall work be done: but the seventh day is the sabbath of rest, a holy convocation: ye shall do no work in it: it is the sabbath of the LORD in all your dwellings.

Deuteronomy 12:6

And thither ye shall bring your burnt-offerings, and your sacrifices, and your tithes, and heave-offerings of your hand, and your vows, and your free-will-offerings, and the firstlings of your herds, and of your flocks:

1 Chronicles 29:3-8

Moreover, because I have set my affection to the house of my God, I have of my own possessions, of gold and silver, which I have given to the house of my God, over and above all that I have prepared for the holy house,

2 Chronicles 35:7-8

And Josiah gave to the people, of the flock, lambs and kids, all for the passover-offerings, for all that were present, to the number of thirty thousand, and three thousand bullocks: these were of the king's substance.

Ezra 2:68-69

And some of the chief of the fathers, when they came to the house of the LORD which is at Jerusalem, offered freely for the house of God to set it up in its place:

Treasury of Scripture Knowledge

Summary

Beside the sabbaths of the LORD, and beside your gifts, and beside all your vows, and beside all your freewill offerings, which ye give unto the LORD.

Bible References

The sabbaths

Leviticus 23:3
Six days shall work be done: but the seventh day is the sabbath of rest, a holy convocation: ye shall do no work in it: it is the sabbath of the LORD in all your dwellings.
Leviticus 19:3
Ye shall fear every man his mother and his father, and keep my sabbaths: I am the LORD your God.
Genesis 2:2
And on the seventh day God ended his work which he had made; and he rested on the seventh day from all his work which he had made.
Exodus 20:8
Remember the sabbath-day to keep it holy.

And beside

Numbers 29:39
These things ye shall do to the LORD in your set feasts, besides your vows, and your free-will-offerings, for your burnt-offerings, and for your meat-offerings, and for your drink-offerings, and for your peace-offerings.
Deuteronomy 12:6
And thither ye shall bring your burnt-offerings, and your sacrifices, and your tithes, and heave-offerings of your hand, and your vows, and your free-will-offerings, and the firstlings of your herds, and of your flocks:
1 Chronicles 29:3
Moreover, because I have set my affection to the house of my God, I have of my own possessions, of gold and silver, which I have given to the house of my God, over and above all that I have prepared for the holy house,
2 Chronicles 35:7
And Josiah gave to the people, of the flock, lambs and kids, all for the passover-offerings, for all that were present, to the number of thirty thousand, and three thousand bullocks: these were of the king's substance.
Ezra 2:68
And some of the chief of the fathers, when they came to the house of the LORD which is at Jerusalem, offered freely for the house of God to set it up in its place: