إِلَّا حَرْفُ تَحْقِيْقٍ

A word in the Arabic language will either be 1) a verb or 2) a noun or 3) a particle – إِلَّا حَرْفُ تَحْقِيْقٍ is a particle

إِلَّاUntilحَرْفٌحَرْفُ تَحْقِيْقٍ
RootbutParticleParticle of certainty
Surah/Below are the 3 verses in the holy Quran containing the particle of certaintyإِلَّا
Verse
O you who believe! spend from the pure (good things) of what you earnedيَآ أَيُّهَا الَّذِيْنَ ءَامَنُوا أَنْفِقُوا مِنْ طَيِّبَاتِ مَا كَسَبْتُمْ
and from what We brought forth for you from the earthوَمِمَّآ أَخْرَجْنَا لَكُم مِّنَ الأَرْضِ
and do not aim at the bad of it, to spend, while not you would take itوَلَا تَيَمَّمُوا الخَبِيْثَ مِنْهُ تُنْفِقُوْنَ وَلَسْتُمْ بِئَاخِذِيْهِ
2-267but with closed eyes over it and know that Allah (SWT) is Rich, Praiseworthyإِلَّآ أَنْ تُغْمِضُوا فِيْهِ وَاعْلَمُوا أَنَّ اللهَ غَنِيٌّ حَمِيْدٌ
98-4And those who were given the book differed not until after clear evidence came to themوَمَا تَفَرَّقَ الَّذِيْنَ أُوْتُوْا الْكِتَابَ إِلَّا مِنْ بَعْدِ مَا جَائَتْهُمُ الْبَيِّنَةُ
And not were they commanded but to worship Allah (SWT) being sincere to Him, the upright religionوَمَآ أُمِرُوْا إِلَّا لِيَعْبُدُوْا اللهَ مُخْلِصِيْنَ لَهُ الدِّيْنَ حُنَفَآءَ
98-5and to establish the prayer and to give the charity (obligatory tax) and that is the correct religionوَيُقِيْمُوْا الصَّلَاةَ وَيُؤْتُوْا الزَّكَاةَ وَذَلِكَ دِيْنُ القَيِّمَةِ