大比丘三千威儀 1.36

1.36

One should mindfully contemplate five matters: first, one should contemplate the merits of the Buddha; second, one should contemplate the sutras and precepts of the Buddha; third, one should contemplate the wisdom of the Buddha; fourth, one should contemplate the benevolence of the Buddha as being immense and difficult to repay; fifth, one should contemplate the vigor of the Buddha culminating in nirvāṇa.