American Standard Version
Wherefore should the nations say, Where is their God? Let the avenging of the blood of thy servants which is shed Be known among the nations in our sight.

Berean Study Bible
Why should the nations ask, “Where is their God?” Before our eyes, make known among the nations Your vengeance for the bloodshed of Your servants.

Douay-Rheims Bible
Lest they should say among the Gentiles: Where is their God? And let him be made known among the nations before our eyes, By the revenging the blood of thy servants, which hath been shed:

English Revised Version
Wherefore should the heathen say, Where is their God? let the revenging of the blood of thy servants which is shed be known among the heathen in our sight.

King James Bible
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.

World English Bible
Why should the nations say, "Where is their God?" Let it be known among the nations, before our eyes, that vengeance for your servants' blood is being poured out.

Young's Literal Translation
Why do the nations say, 'Where is their God?' Let be known among the nations before our eyes, The vengeance of the blood of Thy servants that is shed.

Psalm 79:10 Additional Translations ...