Helaman 6:26

Now behold, those secret oaths and covenants did not come forth unto Gadianton from the records which were delivered unto Helaman; but behold, they were put into the heart of Gadianton, by that same being who did entice our first parents to partake of the forbidden fruit;

These secret promises did not come to Gadianton from the records given to Helaman. The same being who got our first parents to eat the forbidden fruit put them in Gadianton’s heart.

These secret oaths and covenants didn’t come from the records given to Helaman. They were planted in Gadianton’s heart by the same dark being who convinced our first parents to eat the forbidden fruit.