Rashi on Ezekiel
she did not pour it out on the ground, etc. Jonathan paraphrased: with willful wickedness and with an arm raised on high did she shed it; she did not shed it unintentionally to repent of it. Our Rabbis (Git. 57b, Pesikta d’Rav Kahana 122a) explained it as referring to the blood of Zechariah the son of Jehoiada. They did not treat it as the blood of the deer or the blood of the gazelle.