Isaiah 7:9b

"If you do not stand firm in your faith, you will not stand at all."

If you do not stand
Psalm 20:8 They are brought to their knees and fall, but we rise up and stand firm.
Isaiah 8:10 Devise your strategy, but it will be thwarted; propose your plan, but it will not stand, for God is with us.
Isaiah 40:8 "The grass withers and the flowers fall, but the word of our God stands forever."

firm in your faith
2 Chronicles 20:20b "Have faith in the LORD your God and you will be upheld; have faith in his prophets and you will be successful."

you will not stand at all
Isaiah 8:6-8 "Because this people has rejected the gently flowing waters of Shiloah and rejoices over Rezin 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. It will overflow all its channels, run over all its banks and sweep on into Judah, swirling over it, passing through it and reaching up to the neck. Its outspread wings will cover the breadth of your land, O Immanuel!"
Isaiah 30:12-14 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. It will break in pieces like pottery, shattered so mercilessly that among its pieces not a fragment will be found for taking coals from a hearth or scooping water out of a cistern."

NOTES:
Context of Rezin and the King of Assyria - 2 Kings 15-16; 2 Chronicles 28
stand firm - the LORD's warning - Isaiah 1:19-20, 25-26
Read Romans 8

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.