Mormon 1:13

But wickedness did prevail upon the face of the whole land, insomuch that the Lord did take away his beloved disciples, and the work of miracles and of healing did cease, because of the iniquity of the people.

But sin was everywhere in the land. So the Lord took away his beloved disciples. The work of miracles and healing stopped because the people were so wicked.

But evil spread across the whole land. The Lord took away his beloved disciples. Miracles and healings stopped because the people had become so wicked.