Juízes 1:23

23. Sent to descry Or, they reconnoitred. They set a secret watch against Beth-el, to obtain such information as would enable them most easily to capture the city.

Luz Cassel distinguishes between Beth-el and Luz as follows: “As Jebus and Jerusalem are always identified, so it is everywhere remarked of Beth-el that it was formerly Luz; and as Jebus indicated particularly the fortress, Jerusalem the city although the latter name also embraced both so a similar relation must be assumed to have existed between Beth-el and Luz. The latter was evidently a fortress high and strong, whose city descended along the mountain slope.”