Quran 3, Ali 'Imran (House of Imran) ⓘ

3:81When Allah made (His) covenant with the prophets, (He said): Behold that which I have given you of the Scripture and knowledge. And afterward there will come unto you a messenger, confirming that which ye possess. Ye shall believe in him and ye shall help him. He said: Do ye agree, and will ye take up My burden (which I lay upon you) in this (matter)? They answered: We agree. He said: Then bear ye witness. I will be a witness with you.

وَإِذْ أَخَذَ اللَّهُ مِيثَاقَ النَّبِيِّينَ لَمَا آتَيْتُكُمْ مِنْ كِتَابٍ وَحِكْمَةٍ ثُمَّ جَاءَكُمْ رَسُولٌ مُصَدِّقٌ لِمَا مَعَكُمْ لَتُؤْمِنُنَّ بِهِ وَلَتَنْصُرُنَّهُ قَالَ أَأَقْرَرْتُمْ وَأَخَذْتُمْ عَلَى ذَلِكُمْ إِصْرِي قَالُوا أَقْرَرْنَا قَالَ فَاشْهَدُوا وَأَنَا مَعَكُمْ مِنَ الشَّاهِدِينَ