'Avenged' in the Bible

If Cain is to be avenged seven times over,then for Lamech it will be seventy-seven times!

so that the crime against the 70 sons of Jerubbaal might come to justice and their blood would be avenged on their brother Abimelech, who killed them, and on the lords of Shechem, who had helped him kill his brothers.

When he saw one of them being mistreated, he came to his rescue and avenged the oppressed man by striking down the Egyptian.

because His judgments are true and righteous,because He has judged the notorious prostitutewho corrupted the earth with her sexual immorality;and He has avenged the blood of His slavesthat was on her hands.