In parashat Acharei Mot, there is a commandment given starting from chapter 17 verse 3, where it is forbidden to kill an ox, lamb, or goat either within or outside of the camp. It can only be done for a sacrifice at the Tabernacle. This commandment seems like it's only relevant to those Jews of that time. Is this the case?
I was told that this might be relevant to us if we receive manna in the future. The reasoning was that since Bnei Israel got everything they needed from manna, they were prohibited from slaughtering these animals. Are there any writings that support this theory? Is the miracle of manna expected to return?