Whereon
From BiblePortal Wikipedia
Webster's Dictionary [1]
(1): ( adv.) On what; - used interrogatively; as, whereon do we stand?
(2): ( adv.) On which; - used relatively; as, the earth whereon we live.
King James Dictionary [2]
Whereon, adv. where and on.
1. On which as the ground whereon we tread. 2. On what. Whereon do we stand?