Zayd reported that when the Prophet ﷺ arrived in Medina, he was taken to him. The Prophet ﷺ was impressed by him, and the people said, "Messenger of Allah, this is a boy from Banu Najjar who has memorized more than ten surahs of what Allah has revealed to you."The Prophet ﷺ was pleased by this and said, "Zayd, learn the writing of the Jews for me, for by Allah, I do not trust the Jews with my correspondence."Zayd said, "So I learned their script, and not even fifteen nights had passed before I had mastered it. I would read their letters to him whenever they wrote to him, and I would write his replies whenever he wrote to them."
حدثنا سليمان بن داود حدثنا عبد الرحمن بن أبي الزناد عن أبيه عن خارجة بن زيد أن
أخبره أنه لما قدم النبي ﷺ المدينة قال زيد ذهب بي إلى النبي ﷺ فأعجب بي فقالوا يا رسول الله هذا غلام من بني النجار معه مما أنزل الله عليك بضع عشرة سورة فأعجب ذلك النبي ﷺ وقال يا زيد تعلم لي كتاب يهود فإني والله ما آمن يهود على كتابي قال زيد فتعلمت كتابهم ما مرت بي خمس عشرة ليلة حتى حذقته وكنت أقرأ له كتبهم إذا كتبوا إليه وأجيب عنه إذا كتب