Joseph Smith’s Testimony 1:47; “After this third visit, he again ascended into heaven as before, and I was again left to ponder on the strangeness of what I had just experienced; when almost immediately after the heavenly messenger had ascended from me for the third time, the cock crowed, and I found that day was approaching, so that our interviews must have occupied the whole of that night.”
Luke 22:34, 60-62; “34 And he said, I tell thee, Peter, the cock shall not crow this day, before that thou shalt thrice deny that thou knowest me. 60 And Peter said, Man, I know not what thou sayest. And immediately, while he yet spake, the cock crew.61 And the Lord turned, and looked upon Peter. And Peter remembered the word of the Lord, how he had said unto him, Before the cock crow, thou shalt deny me thrice.62 And Peter went out, and wept bitterly.”
Shock doesn’t quite explain my reaction the first time I saw this passage in Joseph Smith’s testimony.