Isaiah 30:15

This is what the Sovereign LORD, the Holy One of Israel says: "In repentance and rest is your salvation, in quietness and trust is your strength, but you would have none of it."

This is what the Sovereign LORD
Jeremiah 7:20 "'Therefore this is what the Sovereign LORD says: My anger and my wrath will be poured out on this place, on man and beast, on the trees of the field and on the fruit of the ground, and it will burn and not be quenched.'"
Ezekiel 3:11 "Go now to your countrymen in exile and speak to them. Say to them, 'This is what the Sovereign LORD says,' whether they listen of fail to listen."

the Holy One of Israel
Isaiah 30:12-13 Therefore, this is what the Holy One of Israel says: "Because you have rejected this message, relied on oppression and depended on deceit, this sin will become for you like a high wall, cracked and bulging, that collapses suddenly, in an instant."

In repentance and rest
Exodus 14:14 "The LORD will fight for you; you need only to be still."
Joshua 1:13 "Remember the command that Moses the servant of the LORD gave you: 'The LORD your God is giving you rest and has granted you this land.'"

in quietness and trust
2 Chronicles 20:12 "O our God, will you not judge them? For we have no power to face this vast army that is attacking us. We do not know what to do, but our eyes are upon you."
Isaiah 32:17 The fruit of righteousness will be peace; the effect of righteousness will be quietness and confidence forever.

but you would have none of it
Isaiah 8:6-7a "Because this people has rejected the gently flowing waters of Shiloah and rejoices over Rezin and the son of Remaliah, therefore the Lord is about to bring against them the mighty floodwaters of the River--the King of Assyria with all his pomp."
Isaiah 42:24 Who handed Jacob over to become loot, and Israel to the plunderers? Was it not the LORD, against whom we have sinned? For they would not follow his ways; they did not obey his law.
Isaiah 57:17 "I was enraged by his sinful greed; I punished him, and hid my face in anger, yet he kept on in his willful ways."

NOTES:
Isaiah 26:3 You will keep in perfect peace him whose mind is steadfast, because he trusts in you.

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984 by International Bible Society. Used by permission. All rights reserved worldwide.