Tafsir of Al-Mulk 67:17

أم أمنتم من في السماء أن يرسل عليكم حاصبا

Or do you feel secure that He, Who is over the heaven, will not send against you a Hasib? meaning, a wind containing gravel that will strike you, as Allah says in another Ayah,

أفٲمنتم أن يخسف بكم جانب البر أو يرسل عليكم حاصبا ثم ﻻ تجدوا لكم وكيﻼ

Do you then feel secure that He will not cause a side of the land to swallow you up, or that He will not send against you a violent sandstorm Then, you shall find no trustee. (17:68) And similarly, here Allah threatens them with His statement,

فستعلمون كيف نذير

Then you shall know how has been My warning. meaning, `how is My admonition and what will happen to those who disregard and reject it.' Then Allah says,