مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3567
Musnad of Abdullah bin Mas'ood
It was narrated that ‘Abdullah (رضي الله عنه) said: A man from the People of the Book came to the Prophet (ﷺ) and said: O Abul-Qasim, have you heard that Allah, may He be glorified and exalted, will carry all living beings on one finger, and the heavens on one finger, and the earth on one finger and the trees on one finger and the soil on one finger? The Prophet (ﷺ) smiled so broadly that his molars could be seen, then Allah revealed the words: "They made not a just estimate of Allah such as is due to Him..." (az-Zumar 39:67).
Musnad Ahmad 3590Its isnad is saheeh, al-Bukhari (7415) and Muslim (801)]