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. (Using translation from Abū Dāʾūd 3645)
قَالَ زَيْدُ بْنُ ثَابِتٍ أَمَرَنِي رَسُولُ اللهِ ﷺ فَتَعَلَّمْتُ لَهُ كِتَابَ يَهُودَ وَقَالَ إِنِّي وَاللهِ مَا آمَنُ يَهُودَ عَلَى كِتَابِي فَتَعَلَّمْتُهُ فَلَمْ يَمُرَّ بِي نِصْفُ شَهْرٍ وَقَالَ أَبُو دَاوُدَ إِلَّا نِصْفُ شَهْرٍ حَتَّى حَذَقْتُهُ قَالَ أَبِي فَكُنْتُ أَكْتُبُ لَهُ إِذَا كَتَبَ وَأَقْرَأُ لَهُ إِذَا كُتِبَ إِلَيْهِ