Al-Bara’ b. ‘Azib said

My maternal uncle Abu Burda b. Niyar passed me carrying a standard, and I asked him where he was going. He replied, “The Prophet (ﷺ) has sent me to bring him the head of a man who has married his father’s wife.” A version by Abu Dawud, Nasa’i, Ibn Majah and Darimi has, “He has ordered me to cut off his head and take his property.” This version has “my paternal uncle” instead of “my maternal uncle.” Tirmidhi and Abu Dawud transmitted it.