Leviticus 23:38

besides the sabbath of Jehovah, and besides your gifts, and besides all your vows, and besides all your free-will offerings which you give to Jehovah.

Numbers 29:39

You shall prepare these to Jehovah in your appointed seasons, besides your vows and your free-will offerings, for your burnt offerings, and for your food 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

You shall each man revere his mother and his father, and keep My sabbaths. I am Jehovah your God.

Leviticus 23:3

Six days shall work be done, but the seventh day is the sabbath of rest, a holy convocation. You shall not do any work. It is a sabbath to Jehovah in all your dwellings.

Deuteronomy 12:6

And there you shall bring your burnt offerings, and your sacrifices, and your tithes, and heave offering of your hand, and your vows, and your free-will offerings, and the first-born of your herds and of your flocks.

1 Chronicles 29:3-8

And also, because I have delighted in the house of my God, out of my own treasure of gold and silver 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 from the flock, lambs and kids, all for the Passover offerings, for all who were present, to the number of thirty thousand, and three thousand oxen. These were from what the king owned.

Ezra 2:68-69

And some of the chief of the fathers, when they came to the house of Jehovah 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. You shall not do any work. It is a sabbath to Jehovah in all your dwellings.
Leviticus 19:3
You shall each man revere his mother and his father, and keep My sabbaths. I am Jehovah 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
You shall prepare these to Jehovah in your appointed seasons, besides your vows and your free-will offerings, for your burnt offerings, and for your food 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 heave offering of your hand, and your vows, and your free-will offerings, and the first-born of your herds and of your flocks.
1 Chronicles 29:3
And also, because I have delighted in the house of my God, out of my own treasure of gold and silver 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 from the flock, lambs and kids, all for the Passover offerings, for all who were present, to the number of thirty thousand, and three thousand oxen. These were from what the king owned.
Ezra 2:68
And some of the chief of the fathers, when they came to the house of Jehovah at Jerusalem, offered freely for the house of God to set it up in its place.