Definition: "IPC1" stands for "Instruction to Peter." It's a command issued by Jesus Christ at the beginning of his apostolic mission in the wilderness, as recounted in Acts 20:36-40. The text highlights what Peter should do regarding a group of men who were being led astray. Specifically, Jesus instructed him to bring them back to their original faith, even though they had already repented. The word "ipc" signifies "Peter."