Thus God rendered the wickedness of Abimelech, which he did unto his father, in slaying his seventy brethren:
Thus God repaid the wickedness of Abimelech which he had done to his father [Gideon] by slaying his seventy brothers;
Thus God requited the wickedness of Abimelech, which he did unto his father, in slaying his seventy brethren;
Thus God paid back Abimelech for the evil he had done to his father by killing his seventy brothers.
And so did God repay the evil that Abimelech had done against his father by killing his seventy brothers.