Surah 78. An-Naba, Ayah 9

Thus Zamakhshari, stressing the primary significance of subat as "cutting-off" (qat'), i.e., "death"; also the famous second-century philologist Abu 'Ubaydah Ma'mar ibn al-Muthanna, who (as quoted by Razi) explains the above Qur'anic phrase as an "analogue (shibh) of death".