Isaiah 56:4

For thus sayeth the LORD, first unto the gelded that keepeth my Sabbath - namely, that holdeth greatly of the thing that pleaseth me, and keepeth my covenant -

Joshua 24:15

But if it seem evil unto you to serve the LORD, then choose you this day, whom you will serve: whether the gods which your fathers served, that were on the other side of the water, or the gods of the Amorites in whose land, ye dwelt. As for me and my house, we will serve the LORD."

2 Samuel 23:5

And is not mine house so with God? In that he hath made with me an everlasting covenant, perfect in all points. And in that he shall fulfill all that is healthsome unto me, and all my desires thereto;

Psalm 119:111

Thy testimonies have I claimed as my heritage forever; and why? They are the very joy of my heart.

Isaiah 27:5

Or who will enforce me to keep or make peace?

Isaiah 55:3

Incline your ears, and come unto me, take heed, and your soul shall live. For I will make an everlasting covenant with you, even the sure mercies of David.

Isaiah 56:2

Blessed is the man that doth this, and the man's child which keepeth the same. He that taketh heed, that he unhallow not the Sabbath; that is, he that keepeth himself that he do no evil.

Isaiah 56:6

Again, he sayeth unto the strangers that are disposed to stick to the LORD, to serve him, and to Love his name: That they shall be no bondman. And all they, which keep themselves, that they unhallow not the Sabbath - namely, that they fulfill my covenant -

Jeremiah 50:5

They shall ask the way to Zion; thither shall they turn their faces, and come and hang upon thee, in a covenant that never shall be broken.

Luke 10:42

verily one is needful. Mary hath chosen her that good part, which shall not be taken away from her."

Hebrews 6:17

So God, willing very abundantly to show, unto the heirs of promise, the stableness of his counsel; he added an oath,

Treasury of Scripture Knowledge

Summary

For thus saith the LORD unto the eunuchs that keep my sabbaths, and choose the things that please me, and take hold of my covenant;

Bible References

Choose

Joshua 24:15
But if it seem evil unto you to serve the LORD, then choose you this day, whom you will serve: whether the gods which your fathers served, that were on the other side of the water, or the gods of the Amorites in whose land, ye dwelt. As for me and my house, we will serve the LORD."
Psalm 119:111
Thy testimonies have I claimed as my heritage forever; and why? They are the very joy of my heart.
Luke 10:42
verily one is needful. Mary hath chosen her that good part, which shall not be taken away from her."

Take hold

Isaiah 27:5
Or who will enforce me to keep or make peace?
Isaiah 55:3
Incline your ears, and come unto me, take heed, and your soul shall live. For I will make an everlasting covenant with you, even the sure mercies of David.
2 Samuel 23:5
And is not mine house so with God? In that he hath made with me an everlasting covenant, perfect in all points. And in that he shall fulfill all that is healthsome unto me, and all my desires thereto;
Jeremiah 50:5
They shall ask the way to Zion; thither shall they turn their faces, and come and hang upon thee, in a covenant that never shall be broken.
Hebrews 6:17
So God, willing very abundantly to show, unto the heirs of promise, the stableness of his counsel; he added an oath,

General references

Genesis 17:9
And God said unto Abraham, "See thou keep my covenant, both thou and thy seed after thee in their times.
Exodus 20:8
"Remember the Sabbath day that thou sanctify it.
Leviticus 25:45
and of the children of the strangers that are sojourners among you, and of their generations that are with you, which they begat in your land.
Numbers 9:14
And when a stranger dwelleth among you and will offer Passover unto the LORD, according to the ordinance of Passover and manner thereof shall he offer it. And ye shall have one law both for the stranger and for him that was born at home in the land.'"
Deuteronomy 29:9
Keep therefore the words of this covenant and do them, that ye may understand all that ye ought to do.