1 Nephi 20:4

And I did it because I knew that thou art obstinate,

and thy neck is an iron sinew, and thy brow brass;

and thy neck is an iron sinew, and thy brow brass;

thy - 22 occurrences in 11 verses - 1 Nephi 20:4, 17, 18, 19,   21:16, 17, 19, 22, 23, 25, 26