大日經持誦次第儀軌 1.124

1.124

a座aṃ大悲地界，金剛座下金剛寶地所執持故。如地能生萬物，荷負一切世閒不可傾動；如是，一切智地從如來金剛性生，即此生者畢竟無生，能生菩提萬善，執持一切賢聖心地，不可沮壞也。

A, seat, aṃ: the earth-realm of great compassion; because it is upheld by the vajra jewel ground beneath the vajra seat. Just as the earth can produce the myriad things and bear all the world without being shaken; in this way, the ground of omniscience is born from the Tathāgata's vajra nature, and that which is thus born is ultimately unborn, able to give birth to the myriad virtues of bodhi, and to uphold the mind-ground of all the worthy and noble ones without being destroyed.