Albert Barnes Commentary Ezra 1:4

"And whosoever is left, in any place where he sojourneth, let the men of his place help him with silver, and with gold, and with goods, and with beasts, besides the freewill-offering for the house of God which is in Jerusalem." — Ezra 1:4 (ASV)

Let the men of his place help him — that is, “Let the pagan population help him” .

The freewill offering — Probably that made by Cyrus himself (Ezra 1:7–11).