John Gill Commentary Deuteronomy 16:5

"Thou mayest not sacrifice the passover within any of thy gates, which Jehovah thy God giveth thee;" — Deuteronomy 16:5 (ASV)

You may not sacrifice the passover within any of your gates ,
&c.] Or cities, as the Targum of Jonathan, so called because they usually had gates to them, in which public affairs were transacted; but in none of these, only in the city of Jerusalem, the place the Lord chose, might they kill the passover and eat it, and other passover offerings:

which the Lord your God gives you ;
in the land of Canaan, and which land was given them of God.