Yazid bin Bara’ narrated from his father, who said: I met my uncle who had a banner with him. I asked: Where are you going? He replied: The Messenger of Allah (peace be upon him) has sent me to a man who has married his father’s wife, and he (peace be upon him) has commanded me to behead him and seize his wealth.
Hadith Referenceسنن دارمي / من كتاب النكاح / 2276
Hadith Gradingتحقیق (حسین سلیم أسد الدارانی):إسناده حسن وهو على شرط مسلم، [مكتبه الشامله نمبر: 2285]
Hadith Takhrijاس روایت کی سند حسن علی شرط مسلم ہے۔ دیکھئے: [أبوداؤد 4457] ، [ترمذي 1362] ، [نسائي 3332] ، [أبويعلی 1666] ، [ابن حبان 4112] ، [موارد الظمآن 1516]
Brief Explanation
(Commentary on Hadith 2275)
A person who marries his stepmother is a great criminal; his punishment is that all his wealth and property should be confiscated and his head should be severed, so that no one in the future dares to commit such a heinous act. And to marry one's real mother is an even more abominable and dreadful act.