مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2434
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn 'Abbas (رضي الله عنه) said: The Messenger of Allah (ﷺ) said: “Hearing about something is not the same as seeing it with one's own eyes. Allah, may He be glorified and exalted, told Moosa what his people had done to the calf, and he did not throw down the Tablets, but when he saw what they had done, he threw down the Tablets and they broke.
Musnad Ahmad 2447A saheeh hadeeth; its isnad is daeef]