Scripture

And remember when Allah took a covenant from the prophets, saying, ‘I have given you the Book and wisdom. Then, if a messenger comes to confirm what you have, you must believe in him and support him.’ He asked, ‘Do you acknowledge and accept this commitment?’ They replied, ‘We acknowledge it.’ He said, ‘Then bear witness, and I am with you among the witnesses.’

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.