مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3059
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn Abbas (رضي الله عنه) that when The Messenger of Allah (ﷺ) raised his head from bowing he said: Sami'allah liman hamidah, then he said: "O Allah to You be praise, filling the heavens, filling the earth and filling whatever You will besides."
Musnad Ahmad 3083A saheeh hadeeth]