Matthew 24
4 And Jesus answered and said unto them, Take heed that no man deceive you.
5 For many shall come in my name, saying, I am Christ; and shall deceive many.
11 And many false prophets shall rise, and shall deceive many.
23 Then if any man shall say unto you, Lo, here
is Christ, or there; believe
it not.
24 For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that,
if it were possible, they shall deceive the very elect.
25 Behold, I have told you before.
Joseph Smith taught a so-called gospel contrary to the Bible.
Galatians 1
6 I marvel that ye are so soon removed from him that called you into the grace of Christ unto another gospel:
7 Which is not another; but there be some that trouble you, and would pervert the gospel of Christ.
8 But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed.
9 As we said before, so say I now again, If any
man preach any other gospel unto you than that ye have received, let him be accursed.
Jude 1
3 Beloved, when I gave all diligence to write unto you of the common salvation, it was needful for me to write unto you, and exhort
you that ye should earnestly contend for the faith which was once delivered unto the saints.
This diagram is from one of the Mormons' official lesson manuals:
View attachment 232611
Doctrine and Covenants Student Manual, Enrichment G
"D&C 130:20; 132:5. What is the condition for receiving any blessing from God?"