God says
...such as would call God’s messages in question without having any evidence therefor: [a sin] exceedingly loathsome in the sight of God and of those who have attained to faith. It is in this way that God sets a seal on every arrogant, self-exalting heart. -- Q.40:35
And though some be too proud [to listen to this call], they who [in their hearts] are with thy Sustainer extol His limitless glory by night and day, and never grow weary [thereof].-- Q.41:38
Yet indeed , as for any who defend themselves after having been wronged – no blame whatever attaches to them: blame attaches but to those who oppress [other] people and behave outrageously on earth, offending against all right: for them there is grievous suffering in store! -- Q. 42:41,42
The sin of Iblis was false pride that made him disobey God and, yet, not ask for forgiveness: (See surah 7, verses:12 and 13)
Prophet said
1. When enquired about a man who liked that his dress and his shoes should look nice, the Messenger of God said: “God is beautiful and likes beauty. Pride is in disclaiming the truth and despising people”– H: Muslim. N: Ibn Masud.
2. “On the Resurrection Day God will not look at one who lets flow his trouser out of vanity”-- H: Bukhari and Muslim. N: Ibn Omar. (Same is narrated by Abu Hurairah with slight variation in words.)
