Which preposition to use with siloam

by Occurrences 1%

And the Fountain Gate Shallun, the ruler of the district of Mizpah, repaired; and he built it, and covered it, and set up its doors, its bolts, and its bars, and he also built the wall of the Pool of Siloam by the King's Garden, even to the stairs that go down from the city of David.

Which preposition to use with  siloam