1 Nephi 8:38
And after he had preached unto them,
and also prophesied unto them of many things,
he bade them to keep the commandments of the Lord;
and he did cease speaking unto them.
And after he had preached unto them,
and - 174 occurrences in 64 verses - 1 Nephi 6:1, 3, 4, 5, 7:1, 2, 3, 4, 5, 6, 7, 8, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 8:1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 38, 9:1, 2, 4, 6
and after - 7 occurrences in 7 verses - 1 Nephi 7:21, 22, 8:8, 25, 28, 33, 38