Sura al-Aʿrāf 7:46

وَبَيْنَهُمَا حِجَابٌ وَعَلَى ٱلْأَعْرَافِ رِجَالٌ يَعْرِفُونَ كُلًّۢا بِسِيمَىٰهُمْ وَنَادَوْا۟ أَصْحَٰبَ ٱلْجَنَّةِ أَن سَلَٰمٌ عَلَيْكُمْ لَمْ يَدْخُلُوهَا وَهُمْ يَطْمَعُونَ

wa-baynahumā ḥijābun wa-ʿala l-aʿrāfi rijālun yaʿrifūna kullan bi-sīmāhum wa-nādaw aṣḥāba l-jannati an salāmun ʿalaykum lam yadkhulūhā wa-hum yaṭmaʿūna

Between them shall be a veil, and on the heights will be men who would know every one by his marks: they will call out to the Companions of the Garden, "peace on you": they will not have entered, but they will have an assurance (thereof).