The Liahona 

"And now, my son, I have somewhat to say concerning the thing which our fathers call a ball, ordirector—or our fathers called it Liahona, which is, being interpreted, a compass; and the Lord prepared it". Alma 37:38

"And now I say, is there not a type in this thing? For just as surely as this director did bring our fathers, by following its course, to the promised land, shall the words of Christ, if we follow their course, carry us beyond this vale of sorrow into a far better land of promise". Alma 37:45