3 Nephi 18
“When the people had eaten and were filled . . .” probably indicates that they were filled with the spirit – as we should be when we partake of the sacrament.
We must allow all men to come among us that we may minister unto them – we are not to turn any away except from partaking of the sacrament and other sacred ordinances (temple, baptism, and officiating in priesthood actions) before they are prepared.