When to stop watering

So a guy told me the other day that if u water ur plants 8 hours before ur going to cut them that it will add weight. I thought this would just make the budmore wet and just take longer to dry not have any added weight to the final product has anyone else heard of this ?

Don't water before you chop. Chop right before you would usually water for me its 2 days.

Or you can submerge your roots in a bucket of water for a week before you chop ... drown them and start the curing before you chop.