大方廣佛華嚴經疏 49.44

49.44

第九劫風持壞喻，喻佛巧令留惑智，非但能斷亦復能留。謂佛有斯巧，授與根未熟未具萬行菩薩，令留潤生之惑。由此留惑，惑方至盡，得一切智。不同二乘，不為菩提，心期速出。廣明留惑潤生，具如別章。

Ninth is the simile of the kalpa wind sustaining and destroying, which illustrates the Buddha's wisdom of skillfully causing afflictions to be retained; it is not only able to sever them, but also able to retain them. That is, the Buddha possesses this skillfulness, imparting it to bodhisattvas whose faculties are not yet mature and who have not yet fulfilled the myriad practices, causing them to retain the afflictions that moisten rebirth. It is through retaining these afflictions that afflictions are finally exhausted and omniscience is attained. It is unlike the two vehicles, which do not act for the sake of bodhi and whose minds expect a swift departure. A detailed explanation of retaining afflictions to moisten rebirth is fully provided in a separate chapter.