AL-WÂJIB AL-WUJÛD - الواجب الوجود
One of the attributes of Allah (jalla jalâluhu) Whose existence is a necessity. Self-existent pre-eternally, absolute and not possible to be non-existent. The Necessarily existent One.
“Thus, وَ لِلّٰهِ الْمَثَلُ اْلاَعْلٰى , As-Sâni’ Zuljalâl of the universe is Wâjib Al-Wujûd. That is His existence is essential1 , pre-eternal2 , post-eternal3 , its non-existence is impossible4 , its cessation is impossible5 ; it is the most firmly rooted, the most sound, the strongest, and the most perfect of all the levels of existence6 .7 In comparison with His existence, the other levels of existence are like extremely weak shadows. ….
… As-Sâni’ of the universe is not of the same kind as the universe. His Essence resembles no other essences at all...
…the sacred Essence of Al-Wâjib Al-Wujûd is not of the same kind as contingent beings' essences…” The Twentieth Letter-Second Station-The Tenth Phrase/The Fourth