法苑珠林 9.13

9.13

又復一切諸眾生等生苦逼故。在於胎內。處處移動。菩薩不然。從右脇入還住右脇。在於胎內不曾移動。及欲出時從右脇生。不為眾苦之所逼切。此是菩薩未曾有事。表成佛已盡其後際。修行梵行永無有畏。常得快樂無復諸苦。

Furthermore, because all sentient beings are oppressed by the suffering of birth, they move about within the womb from place to place. Not so the Bodhisattva: he entered from the right side and remained in the right side; while in the womb he never moved. And when he was about to emerge, he was born from the right side, without being pressed or afflicted by the host of sufferings. This was an unprecedented event of the Bodhisattva. It symbolizes that after achieving buddhahood, through the end of the ultimate future, in practicing the brahmacarya he would be forever without fear, constantly obtaining joy, free from any further sufferings.