(Yoosuf) 12 : 39
يَا صَاحِبَيِ السِّجْنِ أَأَرْبَابٌ مُتَفَرِّقُونَ خَيْرٌ أَمِ اللَّهُ الْوَاحِدُ الْقَهَّارُ
Oh, my companions of the prison! Are different lords better or Allah, the only Supreme Dictator?
Believer can only select a believer as his intimate friend or patron as explained in verse 4: 144. That is why Yoosuf calls them as “Oh, my companions of the prison”. It is told in verse 40: 16 that "nothing of them will be hidden from the Lord, it will be asked on the Day of Judgment: To whom belongs the Kingship today?’ It is to Lord Allah, the One, the Dictator". Verses 13: 16; 38: 65 and 39: 4 also end as: "Allah is the only Supreme Dictator".