Zech. 13:6
“The clause is an allusion to the ancient practice of tattooing the palm with a symbol of the temple or some other sacred emblem to show devotion so that it might serve as a reminder of one’s commitment. This is an idiomatic and graphic way for the Lord to say: ‘You are constantly before me; I have not forgotten my covenant with you.’” (R. Millet and J. F. McConkie, Doctrinal Commentary on the Book of Mormon, 1:165)