'Believe' in the Bible

and to whom did He swear that they shall not enter into His rest, except to those who did not believe? --

For indeed we have had the good news [of salvation] preached to us, just as the Israelites also [when the good news of the promised land came to them]; but the message they heard did not benefit them, because it was not united with faith [in God] by those who heard.

for we do enter into the rest -- we who did believe, as He said, 'So I sware in My anger, If they shall enter into My rest -- ;' and yet the works were done from the foundation of the world,

But we are not of them who draw back unto perdition; but of them that believe to the saving of the soul.

But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him.

By faith Rahab the prostitute was not destroyed along with those who were disobedient, because she had welcomed the spies [sent by the sons of Israel] in peace.