Surah Yunus, Verse 20
وَيَقُولُونَ لَوْلَآ أُنزِلَ عَلَيْهِ ءَايَةٌۭ مِّن رَّبِّهِۦ ۖ فَقُلْ إِنَّمَا ٱلْغَيْبُ لِلَّهِ فَٱنتَظِرُوٓا۟ إِنِّى مَعَكُم مِّنَ ٱلْمُنتَظِرِينَ
Translation — Sahih International
And they say, "Why is a sign not sent down to him from his Lord?" So say, "The unseen is only for Allah [to administer], so wait; indeed, I am with you among those who wait."
Source
Kur'an-ı Kerim, Yûnus Suresi 10:20
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/10-suresi-20-ayet