瑜伽論記 6.438

6.438

如是六種可樂可愛等者，即六和敬也。前三業為三，和同受用為一，戒見各為一，故六也。

As for 'these six kinds that are delightful, lovable, and so forth', these are the six harmonies and respects: the former three actions count as three, sharing common use counts as one, and precepts and views each count as one, thus making six.