Sunan Abi Dawud Knowledge (Kitab Al-Ilm) Abdullah bin 'Amr bin al-'Aas Abu Bakr bin Abi Shayba أبو بكر بن أبي شيبة al-Walid bin 'Abdullah الوليد بن عبد الله بن أبي مغيث Masdad bin Masrhad مسدد بن مسرهد بن مسربل Ubaidullah bin al-Akhns عبيد الله بن الأخنس النخعي أبو مالك Yahya bin Sa'id bin Farroukh al-Qatan يحيى بن سعيد بن فروخ القطان Yusuf bin Mahk يوسف بن ماهك الفارسي Hasan Sahih The Messenger of Allah (ﷺ) ordered me (to learn the writing of the Jews), so I learnt for him the writing of the Jews. He said: I swear by Allah, I do not trust Jews in respect of writing for me. So I learnt it, and only a fortnight passed before I mastered it. I would write for him when he wrote (to them), and read to him when something was written to him. https://parallelquran.com/hadith/sunan-abi-dawud-3645/