Jacob 7:14

14 And I said unto him: What am I that I should tempt God to show unto you a sign in the thing which thou knowest to be true? Yet thou wilt deny it, because thou art of the devil. Nevertheless, not my will be done; but if God shall smite thee, let that be a sign unto thee that he has power, both in heaven and in earth; and also, that Christ shall come. And thy will, O Lord, be done, and not mine.

2 Nephi 18:18

18. Behold, I and the children whom the Lord hath given me are for signs and for wonders in Israel from the Lord of Hosts, which dwelleth in Mount Zion.

2 Nephi 17:14

14. Therefore, the Lord himself shall give you a sign—Behold, a virgin shall conceive, and shall bear a son, and shall call his name Immanuel.

Matthew 27:41-46

41. Likewise also the chief priest mocking him, with the scribes and elders, said,
42. He saved others; himself he could not save. If he be the King of Israel, let him now come down from the cross, and we will believe him.
43. He trusted in God; let him deliver him now, if he will have him: for he said, I am the Son of God.
44. The thieves also, which were crucified with him, cast the same in his teeth.
45. Now from the sixth hour there was darkness over all the land unto the ninth hour.
46. And about the ninth hour Jesus cried with a loud voice, saying, Eli Eli lama sabachthani? that is to say, My God, my God, why hast thou forsaken me?

Alma 30:44

44. But Alma said unto him; thou hast had signs enough, will ye tempt your God? Will ye say, show unto me a sign, when ye have the testimony of all these thy brethren, and also all the holy prophets; the scriptures are laid before thee, yea, and all things denote there is a God; yea, even the earth, and all things that are upon the face of it, yea, and its motion, yea, and also all the planets which move in their regular form do witness that there is a Supreme Creator.