Alma 17:3

But this is not all: they had given themselves to much prayer, and fasting, therefore they had the spirit of prophecy, and the spirit of revelation, and when they taught, they taught with power and authority, even as with the power and authority of God.

But that’s not all. They had prayed a lot and gone without food. Because of this, they had the spirit of prophecy and the spirit of revelation. When they taught, they taught with power and authority. They taught with the power and authority of God.

But that wasn’t all. They’d devoted themselves to prayer and fasting, so they had the Spirit of prophecy and revelation. When they taught, they taught with power and authority—the kind that comes from God himself.