LDS scripture teaches God approved of and/or encouraged the practice of lying. In the Pearl of Great Price we read that God told Abraham to lie concerning his wife. The Bible teaches that it was Abraham who told his wife to tell the lie, not the Lord.
“And it came to pass, when he was come near to enter into Egypt, that he [Abram] said unto Sarai his wife, Behold now, I know that thou art a fair woman to look upon: Therefore it shall come to pass, when the Egyptians shall see thee, that they shall say, This is his wife: and they will kill me, but they will save thee alive. Say, I pray thee, thou art my sister: that it may be well with me for thy sake; and my soul shall live because of thee.”
Genesis 12:11-13 (AKJV)
In the Book of Abraham we find this story has been rewritten to make it appear that God told Abraham to lie about his wife:
“And it came to pass when I was come near to enter into Egypt, the Lord said unto me: Behold, Sarai, thy wife, is a very fair woman to look upon; Therefore it shall come to pass, when the Egyptians shall see her, they will say – She is his wife; and they will kill you, but they will save her alive; therefore see that ye do on this wise: Let her say unto the Egyptians, she is thy sister, and thy soul shall live. And it came to pass that I, Abraham, told Sarai, my wife, all that the Lord had said unto me – Therefore say unto them, I pray thee, thou art my sister that it may be well with me for thy sake, and my soul shall live because of thee.”
Abraham 2:22-25, The Pearl of Great Price (Liverpool, England: F.D. Richards, 1851 edition), page 23.