출애굽기 25:15의 Halakhah

To not remove the poles of the ark from it: To not remove the poles of the ark from the rings, as it is stated (Exodus 25:15), "The poles shall be in the rings of the ark; they shall not be removed from it." And it is elucidated that this commandment is among the commandments practiced throughout the generations. As the understanding of 'practiced throughout the generations' is not that the doing of that commandment never cease from Israel ever at any time. Rather the matter is like this: Any commandment that was only commanded to do at a specific time and not more - such as that which is written (Exodus 19:15), "Be in preparation for three days"; and so [too,] the warning of Sinai (Exodus 34:3), "neither shall the flocks and the herds graze across from that mountain"; and all that is similar to it, wherein the command was only temporary - those are called commandments that are not practiced throughout the generations. But any commandment that we were not commanded about [only] for a specific time - even though there is a pause at any given time because of our exile or by reason of something else, such as now when, on account of our sins, we do not have the ark - is called a commandment practiced throughout the generations. As any time that we have the ark, we are obligated not to remove its poles from it, so that the Levites [may] take [the ark] out with them, if we need to bring it from one place to another place as a result of war or from whatever reason that [may] arise.