The 99 Names · From the Prophetic Sunnah
Al-Mu'akhkhir المؤخر
The Delayer, who holds back whom He wills by His wisdom; this name is mentioned only together with Al-Muqaddim.
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. 196 ↗
The author explains this name together with: Al-Muqaddim
Evidence
«… أَنْتَ المُقَدِّمُ، وَأَنْتَ المُؤَخِّرُ، لَا إِلَهَ إِلَّا أَنْتَ»
Call upon Allah by this name
“To Allah belong the Beautiful Names, so call upon Him by them” — Al-A'raf 180
From the Prophetic Sunnah
Among the last things he ﷺ said between the tashahhud and the salam
«اللهم اغفر لي ما قدمت وما أخرت وما أسررت وما أعلنت وما أنت أعلم به مني، أنت المقدم وأنت المؤخر لا إله إلا أنت»
Sahih Muslim (771)
Grading: Authentic