Which thou gavest before them, i.e. which thou didst lay open to their view and possession, removing their enemies and all impediments out of the way.
Related Commentaries of Nehemiah 9:35
Nehemiah 9:35
35 For they have not served thee in their kingdom, and in thy great goodness that thou gavest them, and in the large and fat land which thou gavest before them, neither turned they from their wicked works.