Rashi on Deuteronomy 12:26/רש"י על דברים י״ב:כ״ו

1רק קדשיך ONLY (i.e. however) THY HOLY THINGS [… THOU SHALT BEAR AND GO UNTO THE PLACE WHICH THE LORD SHALL CHOOSE] — This means: although you are permitted to slaughter non-holy animals I do not permit you to slaughter consecrated animals and to eat them in thy gates (i.e. wherever you please) without sacrificing them on the altar, but bring them to the “House of Choice” (the Sanctuary).