Here's the quote from Susan Jootla:
"The Buddha has directly seen the origins of Maha Brahma and understands what it requires to be reborn in his world. In the Brahmajala Sutta (DN 1) the Buddha describes how a supposed Creator God came to believe himself omnipotent and how others came to rely on his sovereignty. His description was based, not on speculation or hearsay, but on his own direct knowledge. The Buddha explains that when our world system disintegrates, as it regularly does after extremely long periods of time, the lower sixteen planes are all destroyed. Beings disappear from all planes below the seventeenth, the plane of the Abhassara gods. Whatever beings cannot be born on the seventeenth or a higher brahma plane then must take birth on the lower planes in other remote world systems."http://www.accesstoinsight.org/lib/auth ... el414.html
She states it is from DN 1, but I don't have my copy of the DN with me right now to check this.