From Sahih Muslim (Hadith 6914):
Juwairiya reported that Allah's Messenger (ﷺ) happened to pass by her as she was observing her dawn prayer; or after she had observed her dawn prayer. The rest of the hadith is the same but with this variation that he said:" Hallowed be Allah according to the number of His creation, hallowed be Allah according to the pleasure of His Self, hallowed be Allah according to the weight of His Throne, hallowed be Allah according to the ink used in recording His words
Reference: Muslim 6914