Isaiah 49:22 (King James Bible) behold I will lift up mine hand to the Gentiles
The 1874 RLDS edition accidentally lost the adverbial up, but the 1908 RLDS edition restored it. The corresponding verse in Isaiah has the up (as does 1 Nephi 21:22, which also quotes Isaiah 49:22).
Summary: Maintain in 2 Nephi 6:6 the up in “I will lift up mine hand”.