🧱The Treasurer's Stone
The mishna says if you take a consecrated stone or beam for yourself, you are not liable for misuse, but if you give it to someone else, you are. The Gemara asks why. Shmuel answers that this is about a Temple treasurer, who is allowed to hold consecrated property, so only giving it away counts as misuse.
Amud a 🏠Living Under the Beam
The mishna says building a consecrated beam into your house isn't misuse until you actually live beneath it. Rav explains this is about placing the beam on a window, not changing it, so there's no misuse until you get benefit from living there. Reish Lakish later explains a related baraita by saying it depends on whether the house was consecrated before or after it was built.
Amud a 🍖Meat Instead of Liver
The mishna teaches that if an agent is told to give guests meat but gives them liver instead, the agent himself is liable for misuse, not the homeowner. Rav Chisda says this follows Rabban Shimon ben Gamliel, since liver is not called meat. Abaye explains it differently: even for Rabbi Akiva, the agent should have gone back to ask first, so by acting on his own he stopped being a true agent.
Amud b