Ezekiel 48:10
And for them, even for the priests, shall be this holy oblation; toward the north five and twenty thousand in length, and toward the west ten thousand in breadth, and toward the east ten thousand in breadth, and toward the south five and twenty thousand in length: and the sanctuary of the Lord shall be in the midst thereof.
Cross-reference
Ezekiel 48:8 describes the same holy oblation with measurements and sanctuary location, of which v10 gives the priestly allocation details.
Ezekiel 48:15 describes the remaining common area for the city, contrasting sharply with the holy portion for priests here.
Ezekiel 45:4 explicitly says this holy portion is for the priests' houses and the sanctuary, directly echoing the priestly district description here.
Ezekiel 45:3 gives the precise measurements for this holy district, designating it as the location for the sanctuary and most holy place.
Ezekiel 45:5 assigns a similar-sized area to the Levites, contrasting their role as temple ministers with the priests' sanctuary ministry.
Paul in 1 Corinthians 9:13 cites OT priests living from temple service, directly applying the same principle shown in the holy portion here.