Exodus 4:8

And it will be, if they will not believe you, neither listen to the voice of the first sign, then they will believe the voice of the latter sign.

Exodus 4:30-31

And Aaron spoke all the words which Jehovah had spoken to Moses, and did the signs in the sight of the people.

Deuteronomy 32:39

See now that I, I am He, and there is no god with me. I kill, and I make alive; I wound and I heal; and there is no deliverer out of My hand.

2 Kings 5:7

And it happened when the king of Israel read the letter, he tore his clothes and said, Am I God, to kill and to make alive, that this man sends to me to recover a man from his leprosy? For consider now, and see, for he is coiling himself toward me.

Job 5:18

For He makes sore, and binds up; He wounds, and His hands make whole.

Isaiah 28:10

For precept must be on precept, precept on precept; line on line, line on line; here a little, there a little;

John 12:37

But though He had done so many miracles before them, yet they did not believe on Him,

Treasury of Scripture Knowledge

Summary

And it shall come to pass, if they will not believe thee, neither hearken to the voice of the first sign, that they will believe the voice of the latter sign.

General references

Bible References

If they

Exodus 4:30
And Aaron spoke all the words which Jehovah had spoken to Moses, and did the signs in the sight of the people.
Isaiah 28:10
For precept must be on precept, precept on precept; line on line, line on line; here a little, there a little;
John 12:37
But though He had done so many miracles before them, yet they did not believe on Him,

That they

Deuteronomy 32:39
See now that I, I am He, and there is no god with me. I kill, and I make alive; I wound and I heal; and there is no deliverer out of My hand.
2 Kings 5:7
And it happened when the king of Israel read the letter, he tore his clothes and said, Am I God, to kill and to make alive, that this man sends to me to recover a man from his leprosy? For consider now, and see, for he is coiling himself toward me.
Job 5:18
For He makes sore, and binds up; He wounds, and His hands make whole.

General references

1 Kings 13:3
And he gave a sign the same day, saying, This is the sign which Jehovah has spoken. Behold, the altar shall be torn apart, and the ashes that are on it shall be poured out.