al-Sulṭān is interpreted in two ways:
1. al-Sulṭān is used in the sense of ḥujja (definitive proof); as in the following verses:
"And We certainly sent Moses with Our signs and a clear sulṭān {that is, a clear ḥujja (definitive proof)}." (Hūd 11:96)
All instances of the word sulṭān used in relation to Moses are in the sense of ḥujja (definitive proof).
"Those entities for which He has not sent down upon you any sulṭān {that is, any ḥujja (definitive proof) in Allah's Book}." (al-Anʿām 6:81)
"Or have We sent down to them any sulṭān {that is, ḥujja (definitive proof)}..." (al-Rūm 30:35)
"Or you bring me a clear sulṭān {that is, a clear ḥujja (definitive proof) by which I could excuse myself}." (al-Naml 27:21)
There are many similar verses.
2. al-Sulṭān is used in the sense of a subjugating king (compelling, coercive sovereignty); as in the following verses:
"I had no sulṭān over you {that is, I had no sovereignty over you to compel you to commit shirk (associating partners with God)}." (Ibrāhīm 14:22)
"We had no sulṭān over you {that is, we had no sovereignty over you to compel you to commit shirk}. Rather, you were a transgressing people." (al-Ṣāffāt 37:30)