Leviticus 23:38

besides the Sabbaths of the LORD, and besides your gifts, and besides all your vows, and besides all your freewill offerings, which you give to the LORD.

Numbers 29:39

"'You shall offer these to the LORD 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

On the sixth 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

"'Each one of you shall respect his mother and his father. You shall keep my Sabbaths. I am the LORD 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; you shall do no manner of work. It is a Sabbath to the LORD in all your dwellings.

Deuteronomy 12:6

and there you shall bring your burnt offerings, and your sacrifices, and your tithes, and the wave offering of your hand, and your vows, and your freewill offerings, and the firstborn of your herd and of your flock:

1 Chronicles 29:3-8

In addition, because I have set my affection on the house of my God, since I have a treasure of my own of gold and silver, I give it to the house of my God, over and above all that I have prepared for the holy house,

2 Chronicles 35:7-8

Josiah gave to the children of the people, of the flock, lambs and young goats, all of them for the Passover offerings, to all who were present, to the number of thirty thousand, and three thousand bulls: these were of the king's substance.

Ezra 2:68-69

Some of the heads of ancestral houses, when they came to the house of the LORD which is in Jerusalem, offered willingly for God's house 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; you shall do no manner of work. It is a Sabbath to the LORD in all your dwellings.
Leviticus 19:3
"'Each one of you shall respect his mother and his father. You shall keep my Sabbaths. I am the LORD your God.
Genesis 2:2
On the sixth 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
"'You shall offer these to the LORD 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 there you shall bring your burnt offerings, and your sacrifices, and your tithes, and the wave offering of your hand, and your vows, and your freewill offerings, and the firstborn of your herd and of your flock:
1 Chronicles 29:3
In addition, because I have set my affection on the house of my God, since I have a treasure of my own of gold and silver, I give it to the house of my God, over and above all that I have prepared for the holy house,
2 Chronicles 35:7
Josiah gave to the children of the people, of the flock, lambs and young goats, all of them for the Passover offerings, to all who were present, to the number of thirty thousand, and three thousand bulls: these were of the king's substance.
Ezra 2:68
Some of the heads of ancestral houses, when they came to the house of the LORD which is in Jerusalem, offered willingly for God's house to set it up in its place: