"مخضب" - Translation from Arabic to English

She testified that the author had come to her house in the morning of 12 March 1987, threatening to kill Nugent. He returned to her home an hour later, holding a knife with blood on the handle and telling her that he had stabbed him.
وشهدت بأن صاحب البلاغ جاء الى منزلها صباح يوم ١٢ آذار/ مارس ١٩٨٧ وهدد بقتل نوجنت، ثم عاد الى منزلها بعد ساعة وهو يمسك بسكين مقبضه مخضب بالدماء وأخبرها أنه طعنه.

It comes from beef that's already been drained of blood.
إن مصدره عجل مخضب بالدماء