ن ح بn-ḥ-b
(ف) نَحَبَ يَنْحَبُ نَحْبًاnaḥaba yanḥabu naḥban: to make a vow, to pledge; also to weep (loudly). (This verb is not used in the Quran.)
نَحْبٌnaḥb (verbal noun, maṣdar, also a noun, ism dhāt): a pledge a person makes binding upon himself; hence it is taken to mean death, which is binding upon everyone; «قَضٰى نَحْبَهُۥqaḍā naḥbahu» is an Arabic idiom: to fulfil one's pledge, i.e. to be martyred or to die. Only once in the Quran: ﴿فَمِنْهُمْ مَّنْ قَضٰى نَحْبَهُۥ وَمِنْهُمْ مَّنْ يَّنْتَظِرُ﴾ (Al-Aḥzāb 33:23)