It is narrated from Sayyiduna Abdullah bin Abbas, may Allah be pleased with them both, that some of the captives of Badr did not possess anything to give as ransom, so the Messenger of Allah, peace and blessings be upon him, set their ransom as teaching the Ansari children how to write. One day, one of those children came to his father crying. He asked: Son! What happened to you? He replied: My teacher hit me. He said: Wretch, he wants to take revenge for Badr. By Allah! You will never go to him again.