The phrase line upon line comes from the following scriptures: For precept must be upon precept, precept upon precept; line upon line, line upon line; here a little, and there a little (Isaiah 28:10).... For behold, thus saith the Lord God: I will give unto the children of men line upon line, precept upon precept, here a little and there a little; and blessed are those who hearken unto my precepts, and lend an ear unto my counsel, for they shall learn wisdom; for unto him that receiveth I will give more; and from them that shall say, We have enough, from them shall be taken away even that which they have (2 Nephi 28:30). For he will give unto the faithful line upon line, precept upon precept; and I will try you and prove you herewith (Doctrine and Covenants 98:12). And again, the