"A sore cursing"

1. 2 Ne. 1: 22
   22 That ye may not be cursed with a sore cursing; and also, that ye may not incur the displeasure of a just God upon you, unto the destruction, yea, the eternal destruction of both soul and body.
2. 2 Ne. 5: 21
   21 And he had caused the cursing to come upon them, yea, even a sore cursing, because of their iniquity. For behold, they had hardened their hearts against him, that they had become like unto a flint; wherefore, as they were white, and exceedingly fair and delightsome, that they might not be enticing unto my people the Lord God did cause a skin of blackness to come upon them.
3. Jacob 3: 3
   3 But, wo, wo, unto you that are not pure in heart, that are filthy this day before God; for except ye repent the land is cursed for your sakes; and the Lamanites, which are not filthy like unto you, nevertheless they are cursed with a sore cursing, shall scourge you even unto destruction.