Leviticus 23:38

besides the sabbaths o Jehovah, and besides your gifts, and besides all your vows, and besides all your freewill-offerings, which ye give unto Jehovah.

Numbers 29:39

These ye shall offer unto Jehovah in your set feasts, besides your vows, and your freewill-offerings, for your burnt-offerings, and for your meal-offerings, and for your drink-offerings, and for your peace-offerings.

Genesis 2:2-3

And on the seventh day God finished 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 ye shall keep my sabbaths: I am Jehovah your God.

Leviticus 23:3

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

Deuteronomy 12:6

and thither ye shall bring your burnt-offerings, and your sacrifices, and your tithes, and the heave-offering of your hand, and your vows, and your freewill-offerings, and the firstlings of your herd and of your flock:

1 Chronicles 29:3-8

Moreover also, because I have set my affection on the house of my God, seeing that I have a treasure of mine own of gold and silver, I give it unto 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 children of the people, of the flock, lambs and kids, all of them for the passover-offerings, unto 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 heads of fathers houses , when they came to the house of Jehovah which is in Jerusalem, offered willingly 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 on the seventh day is a sabbath of solemn rest, a holy convocation; ye shall do no manner of work: it is a sabbath unto Jehovah in all your dwellings.
Leviticus 19:3
Ye shall fear every man his mother, and his father; and ye shall keep my sabbaths: I am Jehovah your God.
Genesis 2:2
And on the seventh day God finished 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 ye shall offer unto Jehovah in your set feasts, besides your vows, and your freewill-offerings, for your burnt-offerings, and for your meal-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 the heave-offering of your hand, and your vows, and your freewill-offerings, and the firstlings of your herd and of your flock:
1 Chronicles 29:3
Moreover also, because I have set my affection on the house of my God, seeing that I have a treasure of mine own of gold and silver, I give it unto 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 children of the people, of the flock, lambs and kids, all of them for the passover-offerings, unto 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 heads of fathers houses , when they came to the house of Jehovah which is in Jerusalem, offered willingly for the house of God to set it up in its place:

American Standard Version Public Domain