Vergil,
Aeneid 8.351-352 (tr. H. Rushton Fairclough):
"This grove," he cries, "this hill with its leafy crown,—though we know not what god it is—is yet a god's home..."
"hoc nemus, hunc," inquit, "frondoso vertice collem,
quis deus incertum est, habitat deus..."
Ovid,
Fasti 3.295-296 (tr. James George Frazer):
Under the Aventine there lay a grove black with the shade of holm-oaks; at the sight of it, you could say, "There is a spirit here."
lucus Aventino suberat niger ilicis umbra,
quo posses viso dicere, "numen inest."
Related post:
A Grove of Ancient Trees.