Which preposition to use with nisibis

on Occurrences 1%

Now since the region near the Tigris is barren of timbers fit for shipbuilding, he brought the boats which had been constructed in the forests surrounding Nisibis on wagons to the river.

on Occurrences 1%

Then there was mutiny in the army; for the Valerians, who had been exempted from military service and afterward had started on a campaign again, had been restless even at Nisibis on account of the victory and ensuing idleness, and also because they had had provisions in abundance and the bulk of the management,

Which preposition to use with  nisibis