68: Al-Qalam
Chapter: 68: Verse: 10-13 - Enemy of Prophet Muhammad called 'illegitimate'
There are many narration which talk about the enemies of the AhlulBait (as) being, illegitimate. This fact is also found in verse of the Holy Quran and in the Tafseer of the verse.
وَلَا تُطِعْ كُلَّ حَلَّافٍ مَّهِينٍ هَمَّازٍ مَّشَّاءٍ بِنَمِيمٍ مَّنَّاعٍ لِّلْخَيْرِ مُعْتَدٍ أَثِيمٍ عُتُلٍّ بَعْدَ ذَٰلِكَ زَنِيمٍ
"And yield not to any mean swearer [68:10] Defamer, going about with slander [68:11] For-bidder of good, out stepping the limits, sinful [68:12] Ignoble, besides all that, base-born (illegitimate) [68:13]"
و هو ما روي عن محمد بن جمهور عن حماد بن عيسى عن حسين بن مختار عنهم صلوات الله عليهم أجمعين في قوله عز و جل وَ لا تُطِعْ كُلَّ حَلَّافٍ مَهِينٍ الثاني هَمَّازٍ مَشَّاءٍ بِنَمِيمٍ مَنَّاعٍ لِلْخَيْرِ مُعْتَدٍ أَثِيمٍ عُتُلٍّ بَعْدَ ذلِكَ زَنِيمٍ قال العتل الكافر العظيم الكفر و الزنيم ولد الزناء
Narrated From Muhammad bin Majhoor, from Hammad bin Isa from Husain bin Mukhtar from Them (as):
Regarding the saying of Allah (swt), "And yield not to any mean swearer " [68:10]; (meaning) The second.
Defamer, going about with slander, For-bidder of good, out stepping the limits, sinful, Ignoble, besides all that, base-born (illegitimate) [68:11-13]; Imam (as) said, 'Al-Utulu' is the disbeliever is great disbelieve. And 'Al-zaneem' is the illegitimate born.
[Source: Taaweel Al-Aayat, Vol.2, Pg. 712]