Talmud for Numbers 35:19

HALAKHAH: “The father is exiled for the son,” etc. Rebbi Zeˋira said that Rebbi Shila bar Binah stated: Even though it be written³⁵Num. 35:19., the redeemer of the blood³⁶The closest family member of the murder victim is required to lead the execution of the duly convicted murderer. Num. 35:30 requires that the killing of the murderer be in the presence of witnesses; this implies that the killing be in execution of a court order (Sifry Num. 161). himself shall kill the murderer, nevertheless if somebody smote his son, his second son does not become the redeemer of the blood to kill his father. But if a brother smote his brother, the second brother becomes the redeemer of the blood to kill his brother. Rebbi Eliezer ben Jacob stated: Even though it be written, the redeemer of the blood himself shall kill the murderer, nevertheless if somebody smote his son, his second son becomes the redeemer of the blood to kill his father. But if a brother smote his brother, the second brother does not become the redeemer of the blood to kill his brother³⁷The Babli 12a simply notes the existence of contradictory interpretations, without attaching names to the traditions. R. Eliezer ben Jacob probably is the second of this name, of the fourth generation of Tannaïm. R. Shila bar Binah (Avinna) belongs to the generation of transition from Tannaïm and Amoraïm.. And from where even if he said, I cannot face him³⁸That he is forced to witness the execution, Sifry Num. 160., the verse says³⁵Num. 35:19., when he comes upon him he shall kill him³⁶The closest family member of the murder victim is required to lead the execution of the duly convicted murderer. Num. 35:30 requires that the killing of the murderer be in the presence of witnesses; this implies that the killing be in execution of a court order (Sifry Num. 161)..