أَمْ كُنتُمْ شُهَدَاء إِذْ حَضَرَ يَعْقُوبَ الْمَوْتُ إِذْ قَالَ لِبَنِيهِ مَا تَعْبُدُونَ مِن بَعْدِي قَالُواْ نَعْبُدُ إِلَهَكَ وَإِلَهَ آبَائِكَ إِبْرَاهِيمَ وَإِسْمَاعِيلَ وَإِسْحَقَ إِلَهًا وَاحِدًا وَنَحْنُ لَهُ مُسْلِمُونَ
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سورة البقرة
(2/133) Or were you witnesses when death came to Jacob? He said to his sons: “What will you serve after me”? They said: “We will serve your God and the God of your fathers, Abraham and Ishmael and Isaac (Ishâq), one God only, and to Him we are submitted”.
Surah Al-Baqarah