﴿ أَمْ كُنتُمْ شُهَدَآءَ إِذْ حَضَرَ يَعْقُوبَ ٱلْمَوْتُ إِذْ قَالَ لِبَنِيهِ مَا تَعْبُدُونَ مِنۢ بَعْدِى قَالُوا۟ نَعْبُدُ إِلَٰهَكَ وَإِلَٰهَ ءَابَآئِكَ إِبْرَٰهِۦمَ وَإِسْمَٰعِيلَ وَإِسْحَٰقَ إِلَٰهًۭا وَٰحِدًۭا وَنَحْنُ لَهُۥ مُسْلِمُونَ ﴾

“Nay, but you [yourselves, O children of Israel,] bear witness that when death was approaching Jacob, he said unto his sons: "Whom will you worship after I am gone?" They answered: "We will worship thy God, the God of thy forefathers Abraham and Ishmael and Isaac, the One God; and unto Him we surrender ourselves."”

Please check ayah 2:134 for complete tafsir.