In 3 Nephi 11:15 it says:
And it came to pass that the multitude went forth, and thrust their hands into his side, and did feel the prints of the nails in his hands and in his feet; and this they did do, going forth one by one until they had all gone forth, and did see with their eyes and did feel with their hands, and did know of a surety and did bear record, that it was he, of whom it was written by the prophets, that should come. (emphasis added)
Hugh Nibley says that chapter 11 of 3 Nephi is perhaps the most powerful statement in the Book of Mormon:
I never can read it, because I choke up every time I try to do it. And it's very simple--that's the idea. The stranger is one of their own. You do not dispute. You repent and get your act together, he says. I am pulling the family together, he says. I want to bring you back to the Father again. He appears entirely to individuals. He always appears to individuals. That's what an atonement [at-one-ment] is. He greets them one by one, he gives them the signs and tokens one by one, he converses with them one by one, he blesses the children one by one. He gives each person to understand; for example, it comes through here in 3 Nephi 11:15. That's the one by one.
[Hugh W. Nibley, Teachings of the Book of Mormon, Semester 4, p. 88--emphasis added]