For the blood of the sons of Jehoiada, i.e. of Zechariah his son; the plural number sons put for the singular son, as it is frequently, both in Scripture, as Gen_46:7Num_26:42, and in Cicero and other profane authors. Or he might kill other sons of Jehoiada with him, either because they owned him in what he had said, or lest they should revenge his death.