Tafsir of Al-Muddathir 74:26

Leave me alone with whom I created lonely. until His statement, It spares not, nor does it leave (anything)!'' Qatadah said, "They claim that he (Al-Walid) said, `By Allah, I thought about what the man says, and it is not poetry. Verily, it has a sweetness and it is truly elegant. Verily, it is exalted and it is not overcome. And I have no doubt that it is magic.' So Allah revealed,

فقتل كيف قدر

(So let him be cursed, how he plotted!),

ثم عبس

وبسر

(Then he frowned and he looked in a bad tempered way.) He contracted his eyes together and scowled.'' Allah says,

سٲصليه سقر