The 99 Names · Verse Keys
Al-Mateen المتين
The Firm, intensely strong, touched by neither weakness nor fatigue in His actions.
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. 94 ↗
The author explains this name together with: Al-'Azeez, Al-Qadeer, Al-Qaadir, Al-Muqtadir, Al-Qawiyy
Evidence
﴿إِنَّ ٱللَّهَ هُوَ ٱلرَّزَّاقُ ذُو ٱلۡقُوَّةِ ٱلۡمَتِينُ ٥٨﴾
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 يا متين، ثبّتني على الحق، واجعل إيماني متينًا لا يتزعزع
O Allah, O Al-Mateen, keep me firm upon the truth, and make my faith strong and unshaken.
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).