Mormon 5:12

Now these things are written unto the remnant of the house of Jacob; and they are written after this manner, because it is known of God that wickedness will not bring them forth unto them; and they are to be hid up unto the Lord, that they may come forth in his own due time.

These things are written for the children of the house of Jacob. They are written this way because God knows that bad people won’t bring them out. These writings will be hidden until the Lord brings them out at the right time.

This record is written for the remnant of the house of Jacob. It’s written this way because God knows that wickedness won’t bring these things to light. They’ll stay hidden until the Lord is ready to reveal them in his own time.