True witness 

(شَهِدَ اللَّهُ أَنَّهُ لَا إِلَٰهَ إِلَّا هُوَ وَالْمَلَائِكَةُ وَأُولُو الْعِلْمِ قَائِمًا بِالْقِسْطِ ۚ لَا إِلَٰهَ إِلَّا هُوَ الْعَزِيزُ الْحَكِيمُ)

 Allah witnesses that there is no deity except Him, and [so do] the angels and those of knowledge –  [that He is] maintaining [creation] in justice. There is no deity except Him, the Exalted in Might, the Wise.

[ Quran 3:18 ]

Quran

​(مَا يَفْتَحِ اللَّهُ لِلنَّاسِ مِنْ رَحْمَةٍ فَلَا مُمْسِكَ لَهَا ۖ وَمَا يُمْسِكْ فَلَا مُرْسِلَ لَهُ مِنْ بَعْدِهِ ۚ وَهُوَ الْعَزِيزُ الْحَكِيمُ)

Whatever Allah grants to people of mercy – no one can withhold it; and whatever He withholds -no one can release it thereafter. And He is the Exalted in Might, the Wise.

[Quran 35- 2]