Charles Ellicott Commentary Isaiah 35:9

"No lion shall be there, nor shall any ravenous beast go up thereon; they shall not be found there; but the redeemed shall walk [there]:" — Isaiah 35:9 (ASV)

No lion shall be there ... — We have to remember that the lion had not ceased to haunt the valley of the Jordan, as it had done in the days of Samson (Judges 14:5), and David (1 Samuel 17:3–4; 2 Samuel 23:20). The recent depopulation of the northern kingdom had probably laid the country more open to their attack (2 Kings 17:25), and thus gave a special force to the prophet’s description. For any ravenous beast, read the most ravenous.

The redeemed ... (Isaiah 35:10) ... the ransomed. — The Hebrew words express simply the idea of release and freedom, without implying, as the English words do, a payment as its condition.