Alma 55:32

And they were thus cautious, that no poison should be administered among them; for if their wine would poison a Lamanite, it would also poison a Nephite; and thus they did try all their liquors.

They were careful so that no poison would be given to them. If their wine would poison a Lamanite, it would also poison a Nephite. So they tested all their drinks.

They were careful that no poison got through. If wine would poison a Lamanite, it would poison a Nephite just the same. So they tested all their drinks this way.