It was narrated from Ibn 'Abbas that:
When the Prophet (ﷺ) said: Sami Allahu liman hamidah (Allah hears the one who praises Him),' he said: Allahumma Rabbana wa lakal-hamd, mil'as-samawati wa mil'al-ardi wa mil'ama shi'ta min shai'in ba'd ( O Allah, our Lord, to You be the Praise, filling the heavens, filling the Earth, and filling whatever else You will.)