3 Nephi 17
When Christ was about to leave on the first day He said that he was going to the lost tribes to show himself to them. I’m not sure if I had ever thought this before, but He could easily have shown himself to two or even three groups on any given day because he would not have needed to sleep. Daytime for one group would be night-time for another. Aside from his healing of their sick and blessing of their children, His first day of ministering among the Nephites could have been done within two hours possibly. It is not hard to imagine that His whole visit that day could have been concluded in 8 hours. After that long the people would have been exhausted from the experience (energized I’m sure, but exhausted too).