1 Nephi 4:20

And after I had done this, I went forth unto the treasury of Laban.

And as I went forth towards the treasury of Laban,

behold, I saw the servant of Laban who had the keys of the treasury.

And I commanded him in the voice of Laban,

that he should go with me into the treasury.

And after I had done this, I went forth unto the treasury of Laban.

and - 321 occurrences in 130 verses - 1 Nephi 1:1, 2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20,   2:1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,   3:1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,   4:1, 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, 34, 35, 36, 37, 38,   5:1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21

and after - 11 occurrences in 11 verses - 1 Nephi 1:15,   3:23, 30, 31,   4:5, 19, 20,   5:3, 6, 8, 10

and after I had - 2 occurrences in 2 verses - 1 Nephi 4:19, 20