Shiavault - a Vault of Shia Islamic Books Nahjul Balagha Part 1, The Sermons Sermon 192: Praise be to Allah who wears the apparel of Honour and Dignity… Known as "al-Khutbah al-Qasi`ah" (Sermon of Disparagement).
It comprises disparagement of Satan [Iblis] for his vanity and his refusing to prostrate before Adam [pbuh], and his being the first to display bigotry and to act through vanity; it comprises a warning to people treading in Satan's path ومن خطبة له (عليه السلام) ومن الناس من يسمّي هذه الخطبة القاصعة وهي تتضمن ذم إبليس، عَلى استكباره، وتركه السجود لادم (عليه السلام)، وأنه أول من أظهر العصبية وتبع الحمية، وتحذير الناس من سلوك طريقته.
Praise be to Allah who wears the apparel of Honour and Dignity and has chosen them for Himself instead of for His creation. He has made them inaccessible and unlawful for others. He has selected them for His own great self, and has hurled a curse on him who contests with Him concerning them. الْحَمْدُ لله الَّذِي لَبِسَ الْعِزَّ وَالْكِبْرِيَاءَ، وَاخْتَارَهُمَا لنَفْسِهِ دُونَ خَلْقِهِ، وَجَعَلَهُمَا حِمىً وَحَرَماً عَلَى غَيْرِهِ، وَاصْطَفَاهُمَا لِجَلاَلِهِ.
وَجَعَلَ اللَّعْنَةَ عَلَى مَنْ نَازَعَهُ فِيهِمَا مِنْ عِبَادِهِ، Allah's trial and the vanity of Iblis رأس العصيان Then He put His angels on trial concerning these attributes in order to distinguish those who are modest from those who are vain. Therefore, Allah, who is aware of whatever is hidden in the hearts and whatever lies behind the unseen said: . . .
"Verily I am about to create man from clay," And when I have completed and have breathed into him of My spirit, then fall ye prostrating in obeisance unto him. And did fall prostrating in obeisance the angels all together, Save lblis;... (Qur'an.
Consequently, he felt proud over Adam by virtue of his creation and boasted over him on account of his origin. Thus, this enemy of Allah is the leader of those who boast, and the fore-runner of the vain.