Best of judges (the most just ruler) in the Holy Quran

﴿وَإِن كَانَ طَآئِفَةٞ مِّنكُمۡ ءَامَنُواْ بِٱلَّذِيٓ أُرۡسِلۡتُ بِهِۦ وَطَآئِفَةٞ لَّمۡ يُؤۡمِنُواْ فَٱصۡبِرُواْ حَتَّىٰ يَحۡكُمَ ٱللَّهُ بَيۡنَنَاۚ وَهُوَ خَيۡرُ ٱلۡحَٰكِمِينَ ﴾ [Al-A‘rāf: 87]

(87) And if there should be a group among you who has believed in that with which I have been sent and a group that has not believed, then be patient until Allah judges between us. And He is the best of judges."

Surah: Al-A‘rāf - Verse: 87 - Juz: 8 - Page: 161

﴿وَٱتَّبِعۡ مَا يُوحَىٰٓ إِلَيۡكَ وَٱصۡبِرۡ حَتَّىٰ يَحۡكُمَ ٱللَّهُۚ وَهُوَ خَيۡرُ ٱلۡحَٰكِمِينَ ﴾ [Yūnus: 109]

(109) And follow what is revealed to you, [O Muhammad], and be patient until Allah will judge. And He is the best of judges.

Surah: Yūnus - Verse: 109 - Juz: 11 - Page: 221

﴿فَلَمَّا ٱسۡتَيۡـَٔسُواْ مِنۡهُ خَلَصُواْ نَجِيّٗاۖ قَالَ كَبِيرُهُمۡ أَلَمۡ تَعۡلَمُوٓاْ أَنَّ أَبَاكُمۡ قَدۡ أَخَذَ عَلَيۡكُم مَّوۡثِقٗا مِّنَ ٱللَّهِ وَمِن قَبۡلُ مَا فَرَّطتُمۡ فِي يُوسُفَۖ فَلَنۡ أَبۡرَحَ ٱلۡأَرۡضَ حَتَّىٰ يَأۡذَنَ لِيٓ أَبِيٓ أَوۡ يَحۡكُمَ ٱللَّهُ لِيۖ وَهُوَ خَيۡرُ ٱلۡحَٰكِمِينَ ﴾ [Yūsuf: 80]

(80) So when they had despaired of him, they secluded themselves in private consultation. The eldest of them said, "Do you not know that your father has taken upon you an oath by Allah and [that] before you failed in [your duty to] Joseph? So I will never leave [this] land until my father permits me or Allah decides for me, and He is the best of judges.

Surah: Yūsuf - Verse: 80 - Juz: 13 - Page: 245