Mark 16:18 ASV and Ephesians 3:20 ASV

A credenza is a peice of furniture in a dining room also called a buffet or sideboard. The word credenza comes from the [medieval] practice of serving food to a servant to ensure that it isn't poisoned! See www.thefreedictionary.com/credenza
Eating poison seems like you're fleecing God, and seems to be a risky way to demonstrate God's power. I'm not going to go out and eat poison tomorrow, but in the right setting, where God could use that power to survive poison to help someone get saved, I have no doubt God could do it. After all, He can do immeasurably more than we could ever ask or imagine (Eph 3:20)