The Quran

Preface

قُلِ اللَّهُ أَعلَمُ بِما لَبِثوا ۖ لَهُ غَيبُ السَّماواتِ وَالأَرضِ ۖ أَبصِر بِهِ وَأَسمِع ۚ ما لَهُم مِن دونِهِ مِن وَلِيٍّ وَلا يُشرِكُ في حُكمِهِ أَحَدًا

Yusuf Ali

Say: “God knows best how long they stayed: with Him is (the knowledge of) the secrets of the heavens and the earth: how clearly He sees, how finely He hears (everything)! They have no protector¹ other than Him; nor does He share His Command with any person whatsoever.²

Who are “they” in the sentence? They may be the Companions of the Cave, for they put themselves under the protection of God, and disowned all attribution of partners to Him. Or “they” may refer to the people in general who go wrong and become “Mushriks”, i.e., attribute imaginary partners to God.
His Command: i.e., God’s government of the world, or in His Judgment on the Day of Judgment