And Helaman feared lest by so doing they should lose their souls; therefore all those who had entered into this covenant were compelled to behold their brethren wade through their afflictions, in their dangerous circumstances at this time.
But behold, it came to pass they had many sons, who had not entered into a covenant that they would not take their weapons of war to defend themselves against their enemies; therefore they did assemble themselves together at this time, as many as were able to take up arms, and they called themselves Nephites.
And they entered into a covenant to fight for the liberty of the Nephites, yea, to protect the land unto the laying down of their lives; yea, even they covenanted that they never would give up their liberty, but they would fight in all cases to protect the Nephites and themselves from bondage.
Now behold, there were two thousand of those young men, who entered into this covenant and took their weapons of war to defend their country. Book of Mormon: Alma 53:15-18
Therefore, all those who receive the priesthood, receive this oath and covenant of my Father, which he cannot break, neither can it be moved.
But whoso breaketh this covenant after he hath received it, and altogether turneth therefrom, shall not have forgiveness of sins in this world nor in the world to come. Doctrine & Covenants 84:40&41
Therefore, inasmuch as some of my servants have not kept the commandment, but have broken the covenant through covetousness, and with feigned words, I have cursed them with a very sore and grievous curse. Doctrine & Covenants 104:4
Never break a covenant, whether you make it with a false man or a just man of good conscience. The covenant holds for both, the false and the just. Avesta: Khorda Avesta