Surah Qaf, ayah 20

وَنُفِخَ فِي ٱلصُّورِۚ ذَٰلِكَ يَوۡمُ ٱلۡوَعِيدِ ٢٠

Wanufikha fis-sūri dhālika yawmul-wa'īd

And the Horn will be blown. That is the Day of [carrying out] the threat.