You are reading a tafsir for the group of verses 21:85 to 21:86
وَاِسْمٰعِیْلَ
وَاِدْرِیْسَ
وَذَا
الْكِفْلِ ؕ
كُلٌّ
مِّنَ
الصّٰبِرِیْنَ
۟ۚۖ
وَاَدْخَلْنٰهُمْ
فِیْ
رَحْمَتِنَا ؕ
اِنَّهُمْ
مِّنَ
الصّٰلِحِیْنَ
۟
3

Ishmael (Isma‘il) was the Prophet Abraham’s son. Some commentators (of the Quran) have held that Idris is the prophet who has been mentioned in the Bible by the name of Enoch. Similarly, Dhul Kifl is perhaps that prophet who has been mentioned in the Bible by the name of Hizti-El. The prophets are refered to as patience personified. The reason for this is that the root of all God-worshipping actions is patience. Patience means abstaining from reaction. A person who is unable to refrain from reaction can never maintain himself on the path of the God-favoured life in this world of trial. The fact is that patience is the door leading to all God’s mercies, in this world as well as in the life after death.