Why should the nations say, "Where is their God?" Before our eyes, make known among the nations that you avenge the outpoured blood of your servants.
NIV
Why should the Gentile nations say, Where is their God? Let vengeance for the blood of Your servants which is poured out be known among the nations in our sight [not delaying until some future generation].
AMP
Wherefore should the heathen say, Where is their God? let him be known among the heathen in our sight by the revenging of the blood of thy servants which is shed.
KJV