When I started looking up the word "believe" in Scripture, I found 115 New Testament scriptures about salvation and believing. There are 35 scriptures(that I found) that condition salvation on faith. To be saved, one must believe and have faith in Christ alone. Here are some of my favorites:
Luke 8:12—Those by the wayside are the ones who hear; then the devil comes and takes away the word out of their hearts, lest they should believe and be saved.
John 1:12—But as many as received Him, to them He gave the right to become children of God, to those who believe in His name.
John 2:23—Now when He was in Jerusalem at the Passover, during the feast, many believed in His name when they saw the signs which He did.
John 3:14-18—And as Moses lifted up the serpent in the wilderness, even so must the Son of Man be lifted up, that whoever believes in Him should not perish but have eternal life. For God so loved the world that He gave His only begotten Son, that whoever believes in Him should not perish but have everlasting life. For God did not send His Son into the world to condemn the world, but that the world through Him might be saved. He who believes in Him is not condemned; but he who does not believe is condemned already, because he has not believed in the name of the only begotten Son of God.
John 3:36—He who believes in the Son has everlasting life; and he who does not believe the Son shall not see life, but the wrath of God abides on him.
John 6:35—And Jesus said to them, “I am the bread of life. He who comes [by faith] to Me shall never hunger, and he who believes in Me shall never thirst.”
John 6:40—And this is the will of Him who sent Me, that everyone who sees the Son and believes in Him may have everlasting life; and I will raise him up at the last day.
John 6:47—Most assuredly, I say to you, he who believes in Me has everlasting life.
John 11:25-27—Jesus said to her, “I am the resurrection and the life. He who believes in Me, though he may die, he shall live. And whoever lives and believes in Me shall never die. Do you believe this?” She said to Him, “Yes, Lord, I believe that You are the Christ, the Son of God, who is to come into the world.”
John 20:31—But these are written that you may believe that Jesus is the Christ, the Son of God, and that believing you may have life in His name.
Acts 8:37—Then Philip said, “If you believe with all your heart, you may.” And he answered and said, “I believe that Jesus Christ is the Son of God.”
Acts 10:43—To Him all the prophets witness that, through His name, whoever believes in Him will receive remission of sins.
Acts 16:31, 34—So they said, “Believe on the Lord Jesus Christ, and you will be saved, you and your household.” . . . Now when he had brought them into his house, he set food before them; and he rejoiced, having believed in God [confirmation of Christ’s deity) with all his household.
Romans 10:8-11—But what does it say? "The word is near you, in your mouth and in your heart" (that is, the word of faith which we preach): that if you confess with your mouth [an expression confirming genuineness of action] the Lord Jesus and believe in your heart [reinforcing the fact that faith must be genuine] that God has raised Him from the dead, you will be saved. For with the heart one believes unto righteousness, and with the mouth confession is made unto salvation [the natural outgrowth of an inward imputation of righteousness, which is solely by faith]. For the Scripture says, “Whoever believes on Him will not be put to shame.”
1 Corinthians 1:21—For since, in the wisdom of God, the world through wisdom did not know God, it pleased God through the foolishness of the message preached to save those who believe.
Galatians 3:22—But the Scripture has confined all under sin, that the promise by faith in Jesus Christ might be given to those who believe.
Ephesians 1:13—In Him you also trusted, after you heard the word of truth, the gospel of your salvation; in whom also, having believed, you were sealed with the Holy Spirit of promise.
Ephesians 2:8, 9— For by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, lest anyone should boast.
1 Timothy 1:16—However, for this reason I obtained mercy, that in me first Jesus Christ might show all longsuffering, as a pattern to those who are going to believe on Him for everlasting life.
1 Timothy 4:10—For to this end we both labor and suffer reproach, because we trust in the living God, who is the Savior of all men, especially of those who believe.
1 John 5:1, 5—Whoever believes that Jesus is the Christ is born of God, and everyone who loves Him who begot also loves him who is begotten of Him. . . . Who is he who overcomes the world, but he who believes that Jesus is the Son of God?
1 John 5:13—These things I have written to you who believe in the name of the Son of God, that you may know that you have eternal life, and that you may continue to believe in the name of the Son of God.