The 99 Names · Names Most Often Paired in the Quran
Al-Khabeer الخبير
The All-Aware, who knows the inner realities of things just as He knows their outward forms.
Explanation
A detailed explanation of this name (in Arabic) is in: Sharh Asma' Allah al-Husna fi Daw' al-Kitab wa al-Sunnah — Dr. Sa'eed ibn 'Ali ibn Wahf al-Qahtani — p. 89 ↗
The author explains this name together with: Al-'Aleem
Evidence
﴿أَلَا يَعۡلَمُ مَنۡ خَلَقَ وَهُوَ ٱللَّطِيفُ ٱلۡخَبِيرُ ١٤﴾
﴿وَهُوَ ٱلۡقَاهِرُ فَوۡقَ عِبَادِهِۦۚ وَهُوَ ٱلۡحَكِيمُ ٱلۡخَبِيرُ ١٨﴾
Call upon Allah by this name
“To Allah belong the Beautiful Names, so call upon Him by them” — Al-A'raf 180
Example for practice
اللهم إنك أنت الخبير بحالي، فاختر لي ما هو خير لي في ديني ودنياي
O Allah, You are Al-Khabeer, fully aware of my state; choose for me what is best for my religion and my worldly life.
An example for practice, not a transmitted text — following the Quranic way of closing a request with the fitting name (see Ibn al-Qayyim, Bada'i' al-Fawa'id 2/249).