The Holy Bible, 1 Chronicles 1:19
19 And unto Eber were born two sons: the name of the one was Peleg; because in his days the earth was divided: and his brother’s name was Joktan.
25 And unto Eber were born two sons: the name of one was Peleg; for in his days was the earth divided; and his brother’s name was Joktan.
The Doctrine and Covenants, Section 133:23-24
23 He shall command the great deep, and it shall be driven back into the north countries, and the islands shall become one land;
24 And the land of Jerusalem and the land of Zion shall be turned back into their own place, and the earth shall be like as it was in the days before it was divided.
The Guide to the Scriptures: Peleg
In the Old Testament, the son of Eber and great-great-grandson of Shem. In his day the earth was divided (Gen. 10:22-25).