It is narrated from Sayyiduna al-Husayn bin Ali (may Allah be pleased with them both) concerning the saying of Allah, the Mighty and Majestic: "And by the witness and the witnessed." He said: "The 'witness' is my maternal grandfather, the Messenger of Allah (peace and blessings be upon him), and the 'witnessed' is the Day of Resurrection." Then he recited this verse: "Indeed, We have sent you as a witness, a bearer of glad tidings and a warner." Then he recited this verse: "That is a Day for which mankind will be gathered, and that is a Day that will be witnessed."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated these hadiths from Zayd bin Aslam (may Allah have mercy on him) except his son Abd al-Rahman bin Zayd."
Hadith Referenceالمعجم الأوسط / باب الياء / 9482
Hadith Gradingمحدثین:إسناده ضعيف لضعف يحيى بن عبد الحميد الحماني
Hadith Takhrij«قال الهيثمي: فيه يحيى بن عبد الحميد الحماني وهو ضعيف «مجمع الزوائد ومنبع الفوائد، ج 7، ص 136»» «أخرجه الطبراني فى «الصغير» برقم: 1137»