無量壽經優婆提舍願生偈註 2.176

2.176

種種法味樂者，毘婆舍那中有觀佛國土清淨味、攝受眾生大乘味、畢竟住持不虛作味、類事起行願取佛土味，有如是等無量莊嚴佛道味，故言種種。是第四功德相。

As for the 'joy of various Dharma flavors': in vipaśyanā there are the flavor of contemplating the purity of the Buddha-land, the flavor of embracing sentient beings into the Mahāyāna, the flavor of ultimate sustaining power that is not in vain, and the flavor of initiating practices and vows to take a Buddha-land based on specific matters; there are immeasurable flavors of adorning the Buddha Path such as these, which is why it is called 'various.' This is the characteristic of the fourth merit.