Hadith 25:129
Jarir narrated to us, from Mughira, who said: I think it is from Ibrahim, regarding a man who seals his will and says to the people, "Bear witness to what is in it." He said: It is not valid unless he reads it to them, or it is read to him, and he affirms what is in it.
حدثنا جرير عن مغيرة قال أراه عن إبراهيم في الرجل يختم وصيته ويقول للقوم اشهدوا على ما فيها قال لا تجوز إلا ان يقرأها عليهم أو تقرأ عليه فيقر بما فيها