"Did he believe he would be permitted to keep it?"

It is permitted To keep that time far off.

In return for the tax, those who paid the jizya were permitted to keep their religion.

In some areas of Canada individuals may be permitted to keep (exempt) certain property.

After supper he rose and filled his pipe which they had permitted him to keep.

After the trouble with the safe, it was not permitted to keep food there any more.

Yes, and that was why they had permitted him to keep the "apprentice" even though the boy probably wasn't learning anything from the old man.

If they work at the marriage but still want to divorce after six months, each will be permitted to keep half the winnings.

However Michelangelo was permitted to keep his share of the money.

At that time the museum was permitted to keep half the objects excavated.