You are reading a tafsir for the group of verses 19:87 to 19:89
لا يملكون الشفاعة الا من اتخذ عند الرحمان عهدا ٨٧ وقالوا اتخذ الرحمان ولدا ٨٨ لقد جيتم شييا ادا ٨٩
لَّا يَمْلِكُونَ ٱلشَّفَـٰعَةَ إِلَّا مَنِ ٱتَّخَذَ عِندَ ٱلرَّحْمَـٰنِ عَهْدًۭا ٨٧ وَقَالُوا۟ ٱتَّخَذَ ٱلرَّحْمَـٰنُ وَلَدًۭا ٨٨ لَّقَدْ جِئْتُمْ شَيْـًٔا إِدًّۭا ٨٩
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3

مَنِ اتَّخَذَ عِندَ الرَّ‌حْمَـٰنِ عَهْدًا

"Except the one who has taken a covenant with the Rahman (All-Merciful) " - 19:87.

Sayyidna Ibn ` Abbas ؓ has said that عَھد means a declaration of firm belief in the Unity of Allah Ta’ ala, while others say that عِھد means committing the Qur’ an to memory. In brief only those people will have the permission to intercede with Allah who stand firm by their covenant to adhere to the true faith. (Ruh)