1 Nephi 15:3
For he truly spake many great things unto them,
which were hard to be understood,
save a man should inquire of the Lord;
and they being hard in their hearts,
therefore they did not look unto the Lord as they ought.
and they being hard in their hearts,
hearts - 4 occurrences in 4 verses - 1 Nephi 15:3, 4, 10, 11