John Gills Exposition of the Bible Commentary - Deuteronomy 12:21
If the place which the Lord thy God hath chosen to put his name be too far from thee ,.... Or rather "for" F8 כי "cum", Pagninus, Montanus. , or "seeing" the place will be too far from thee; for it is allowed before that they might kill and eat flesh for common food in their gates, Deuteronomy 12:15 . then thou shalt kill of thy herd and of thy flock ; of thy oxen and of thy sheep, creatures used in sacrifice; but this was no bar to the use of them for common food also: ... read more
Matthew Henry's Complete Commentary - Deuteronomy 12:5-32
There is not any one particular precept (as I remember) in all the law of Moses so largely pressed and inculcated as this, by which they are all tied to bring their sacrifices to that one altar which was set up in the court of the tabernacle, and there to perform all the rituals of their religion; for, as to moral services, then, no doubt, as now, men might pray every where, as they did in their synagogues. The command to do this, and the prohibition of the contrary, are here repeated again... read more