Psalm 78:37

But, their heart, was not fixed with him, Nor were they trusty in his covenant:

Psalm 78:8

And not become, like their fathers, a generation stubborn and rebellious, - A generation that fixed not their heart, Neither was their spirit, faithful with GOD.

Acts 8:21

Thou hast neither part nor lot in this matter; for, thy heart, is not upright before God.

Deuteronomy 31:20

When I bring them upon the soil which I sware unto their fathers, flowing with milk and honey, and they shall eat and be filled and wax fat, then will they turn away unto other gods and serve them, and despise me, and break my covenant.

Psalm 44:17-18

All this, hath come upon us, Yet had we not forgotten thee, Neither had we dealt falsely with thy covenant;

Psalm 51:10

A pure heart, create for me, O God, And, a steadfast spirit, renew within me.

Psalm 119:80

Let my heart be thorough in thy statutes, that I may not be ashamed.

Hosea 7:14

Neither made they outcry unto me, in their heart, although they kept on howling upon their beds, over corn and new wine, they gathered themselves together, they rebelled against me.

Hosea 7:16-1

They would return - not to him who is on high! They have become like a deceitful bow, their rulers, shall fall by the sword, for the rage of their tongue, this, shall be their derision in the land of Egypt.

Hosea 10:2

Hypocritical is their heart, Now, shall they be held guilty, - He, will break down their altars, he will destroy their statutes.

Treasury of Scripture Knowledge

Summary

For their heart was not right with him, neither were they stedfast in his covenant.

General references

Bible References

Their heart

Psalm 119:80
Let my heart be thorough in thy statutes, that I may not be ashamed.
Hosea 7:14
Neither made they outcry unto me, in their heart, although they kept on howling upon their beds, over corn and new wine, they gathered themselves together, they rebelled against me.
Hosea 10:2
Hypocritical is their heart, Now, shall they be held guilty, - He, will break down their altars, he will destroy their statutes.
Acts 8:21
Thou hast neither part nor lot in this matter; for, thy heart, is not upright before God.

Stedfast

Psalm 78:8
And not become, like their fathers, a generation stubborn and rebellious, - A generation that fixed not their heart, Neither was their spirit, faithful with GOD.
Psalm 44:17
All this, hath come upon us, Yet had we not forgotten thee, Neither had we dealt falsely with thy covenant;
Deuteronomy 31:20
When I bring them upon the soil which I sware unto their fathers, flowing with milk and honey, and they shall eat and be filled and wax fat, then will they turn away unto other gods and serve them, and despise me, and break my covenant.
Hosea 8:1
To thy mouth, with a horn! Like an eagle, on the house of Yahweh, - because they have violated my covenant, and, against my law, have they transgressed.

General references

Hosea 8:2
Unto me, shall they make outcry, My God! we acknowledge thee - we , Israel!