19 And we see that they were not able to enter on account of unbelief.
Hebrews 3:19 Cross References - CAB
Mark 16:16
16 He that believes and is baptized shall be saved; but he that does not believe shall be condemned.
John 3:18
18 He who believes in Him is not condemned; but he who does not believe has been condemned already, because he has not believed in the name of the only begotten Son of God.
John 3:36
36 He who believes in the Son has eternal life; and he who does not believe the Son will not see life, but the wrath of God abides on him."
2 Thessalonians 2:12
12 so that they all might be damned who did not believe the truth, but delighted in unrighteousness.
1 John 5:10
10 He that believes in the Son of God has the testimony in himself; he that does not believe God has made Him a liar, because he has not believed in the testimony which God has testified concerning His Son.
Jude 1:5
5 But I want to remind you, though you once knew this, that the Lord, having saved the people out of the land of Egypt, afterward destroyed those who did not believe.