Qur'ān 54:8 · Al-Qamar (القمر)

مُّهْطِعِينَ إِلَى ٱلدَّاعِ ۖ يَقُولُ ٱلْكَـٰفِرُونَ هَـٰذَا يَوْمٌ عَسِرٌۭ

Racing ahead toward the Caller. The disbelievers will say, "This is a difficult Day."