Helaman 8

As Israel was plagued with fiery serpents, Nephi reminded his people of Moses, that -

"...did he not bear record that the Son of God should come? And as he lifted up the brazen serpent in the wilderness, even so shall he be lifted up who should come.
15 And as many as should look upon that serpent should live, even so as many as should look upon the Son of God with faith, having a contrite spirit, might live, even unto that life which is eternal." (Book of Mormon Helaman 8:14 - 15)

For -

"...after they were bitten he prepared a way that they might be healed; and the labor which they had to perform was to look; and because of the simpleness of the way, or the easiness of it, there were many who perished." (Book of Mormon 1 Nephi 17:41)

Alma simply counseled his son Helaman -

"...see that ye look to God and live." (Book of Mormon Alma 37:47)

for it is stated in many scriptural references -

"...for why will ye die?" (Book of Mormon Jacob 6:6)

Elder Marion G. Romney wrote -

“...Now, from Adam to Noah and beyond, the gospel was taught by father to son. Later on it was revealed to Abraham. Moses received it anew following the long bondage of Israel in Egypt. Jesus, in the meridian of time, taught and demonstrated it. The Jaredites and the Nephites were likewise prophetically instructed.

That men have not enjoyed peace, happiness, and continual progress is, therefore, not because God has failed to make known the way by which these blessings could be had. It is because men have refused to obey the revealed laws upon which these blessings are predicated.

The burden of all the prophets, from Adam to our present prophet, has been to persuade men to look to God and live. Over and over again in every dispensation they have warned of calamities pending because of man’s corrupt and sinful ways.

Cain’s curse was brought on by his own willful rejection of the counsel of God. The antediluvians brought on the flood in which they perished by rejecting Noah, who taught and pleaded with them for one hundred twenty years. The Jaredites pursued their rebellious course to their utter destruction in defiance of the teachings and warnings of their prophets. Following the same course, the Nephites suffered great destruction at the time of Christ’s crucifixion.

All of this endless tragedy, carnage, and sorrow could have been avoided. All of these peoples could have existed in peace and prosperity had they been willing to look to God..." (Look to God and Live, pp. 8–9).