Shì zhū zhòng niǎo, zhòuyè liù shí chū hé yǎ yīn, qí yīn yǎn chàng wŭ gēn, wŭ lì, qī pútí fēn, bā shèng dào fēn rúshì děng fǎ.
In the six periods of the day and night the flocks of birds sing forth harmonious and elegant sounds. Their clear and joyful sounds proclaim their five roots, the five powers, the seven Bodhi elements, the eight sagely ways, and dharmas such as these.
Source: The Amitabha Sutra (tr 402 AD)