Sura al-Ḥajj 22:15

مَن كَانَ يَظُنُّ أَن لَّن يَنصُرَهُ ٱللَّـهُ فِى ٱلدُّنْيَا وَٱلْأَخِرَةِ فَلْيَمْدُدْ بِسَبَبٍ إِلَى ٱلسَّمَآءِ ثُمَّ لْيَقْطَعْ فَلْيَنظُرْ هَلْ يُذْهِبَنَّ كَيْدُهُۥ مَا يَغِيظُ

man kāna yaẓunnu an lan yanṣurahu allāhu fī l-dunyā wa-l-akhirati fa-l-yamdud bi-sababin ilā l-samāʾi thumma l-yaqṭaʿ falyanẓur hal yudhhibanna kayduhu mā yaghīẓu

If any think that Allah will not help him (His Messenger) in this world and the Hereafter, let him stretch out a rope to the ceiling and cut (himself) off: then let him see whether his plan will remove that which enrages (him)!