1 Kings 9:9

And they will say, 'Because they have forsaken Yahweh their God who brought their ancestors out from the land of Egypt and they embraced other gods and bowed down to them and served them. Therefore, Yahweh brought on them all of this disaster.'"

Deuteronomy 29:25-28

And they will say, '[It is] because they abandoned the covenant of Yahweh, the God of their ancestors, which he {made} with them {when he brought them out} from the land of Egypt.

Jeremiah 2:10-13

For go over [to] the coasts of Cyprus and look, and send [to] Kedar and consider very closely, and see if there has been [a thing] like this:

2 Chronicles 7:22

Then they will say, 'Because they forsook Yahweh, the God of their ancestors, who brought them out from the land of Egypt, and [they] laid hold of other gods and worshiped them and served them. Therefore he has brought upon them all this evil.'"

Jeremiah 2:19

Your wickedness will chastise you, and your apostasies will reprove you. Therefore know and see that [it is] evil and bitter, your forsaking of Yahweh, your God, and fear of me [is] not in you," {declares} the Lord, Yahweh of hosts.

Jeremiah 5:19

{And then}, when you [people] say, 'Why has Yahweh our God done all of these [things] to us?' Then you will say to them, 'As you have forsaken me and have served gods of a foreign land in your land, so will you serve strangers in {a land that does not belong to you}.'

Jeremiah 12:7-8

I have forsaken my house, I have abandoned my inheritance. I have given the beloved one of my {heart} into the hand of her enemies.

Jeremiah 16:10-13

{And then} when you tell this people all these words and they ask you, '{Why} has Yahweh pronounced against us all this great evil, and what [is] our iniquity, and what [is] our sin that we have sinned against Yahweh our God?'

Jeremiah 50:7

All [those who] found them have devoured them. And their foes have said, 'We are not guilty, {because} they have sinned against Yahweh, the {true pasture}, even Yahweh, the hope of their ancestors.'

Lamentations 2:16-17

They have opened their mouths against you, all your enemies. They hiss and gnash a tooth, and they say, "We have destroyed [her]! Surely this [is] the day we have hoped for; we have found [it], we have seen [it]!"

Lamentations 4:13-15

Because of the sins of her prophets, the guilt of her priests, who shed blood in her midst, of righteous people.

Ezekiel 36:17-20

"Son of man, the house of Israel, [they] were dwelling on their soil, and they defiled it with their way and with their deeds; like the uncleanness of menstruation was their way {before me}.

Zephaniah 1:4-5

"And I will stretch out my hand against Judah and against all the inhabitants of Jerusalem. And I will cut off from this place the remnant of Baal, and the name of idolatrous priests with the priests,

Treasury of Scripture Knowledge

Summary

And they shall answer, Because they forsook the LORD their God, who brought forth their fathers out of the land of Egypt, and have taken hold upon other gods, and have worshipped them, and served them: therefore hath the LORD brought upon them all this evil.

Bible References

Because

Deuteronomy 29:25
And they will say, '[It is] because they abandoned the covenant of Yahweh, the God of their ancestors, which he {made} with them {when he brought them out} from the land of Egypt.
2 Chronicles 7:22
Then they will say, 'Because they forsook Yahweh, the God of their ancestors, who brought them out from the land of Egypt, and [they] laid hold of other gods and worshiped them and served them. Therefore he has brought upon them all this evil.'"
Jeremiah 2:10
For go over [to] the coasts of Cyprus and look, and send [to] Kedar and consider very closely, and see if there has been [a thing] like this:
Jeremiah 5:19
{And then}, when you [people] say, 'Why has Yahweh our God done all of these [things] to us?' Then you will say to them, 'As you have forsaken me and have served gods of a foreign land in your land, so will you serve strangers in {a land that does not belong to you}.'
Jeremiah 16:10
{And then} when you tell this people all these words and they ask you, '{Why} has Yahweh pronounced against us all this great evil, and what [is] our iniquity, and what [is] our sin that we have sinned against Yahweh our God?'
Jeremiah 50:7
All [those who] found them have devoured them. And their foes have said, 'We are not guilty, {because} they have sinned against Yahweh, the {true pasture}, even Yahweh, the hope of their ancestors.'
Lamentations 2:16
They have opened their mouths against you, all your enemies. They hiss and gnash a tooth, and they say, "We have destroyed [her]! Surely this [is] the day we have hoped for; we have found [it], we have seen [it]!"
Lamentations 4:13
Because of the sins of her prophets, the guilt of her priests, who shed blood in her midst, of righteous people.
Ezekiel 36:17
"Son of man, the house of Israel, [they] were dwelling on their soil, and they defiled it with their way and with their deeds; like the uncleanness of menstruation was their way {before me}.
Zephaniah 1:4
"And I will stretch out my hand against Judah and against all the inhabitants of Jerusalem. And I will cut off from this place the remnant of Baal, and the name of idolatrous priests with the priests,

General references

Deuteronomy 28:59
then Yahweh shall overwhelm [you] with your plagues and the plagues of your offspring, severe plagues and lasting illnesses, grievous and enduring.
Deuteronomy 29:24
And all the nations will say, '{Why} has Yahweh done {such a thing} to this land? What [caused] the fierceness of this great anger?'
Jeremiah 22:8
And many nations will pass by this city and they will say each one to his neighbor, '{Why} has Yahweh done in this manner to this great city?'
Lamentations 4:12
[The] kings of [the] earth did not believe, and all [the] inhabitants of [the] world, that a foe and an enemy could enter into the gates of Jerusalem.