念彼觀音力

Sino-Japanese: nen pi kan-non riki (ねん ぴ かん おん りき)
Sino-Korean: yeom pi gwan eum ryeok (염 피 관 음 력)

Watson translation:
Think on the power of that Perceiver of Sounds

Kubo and Yuyuma translation:
If you contemplate the power of Avalokitesvara

This phrase, 念彼觀音力, is repeated 13 times in Chapter 25 of the Lotus Sutra, aka “The Avalokitesvara Sutra”, aka the “Universal Gateway Chapter” of the Lotus Sutra.

In particular, all 13 repetitions of this phrase are found at the end of that chapter in the verse section. This verse section is often chanted on its own. When done on its own, it only takes about 5 minutes to chant.

Here are some videos:

overly produced sino-japanese

schlocktastic chinese

This is real chanting practice with real practitioners, not a studio mix. But it is the whole chapter, not just the verse section:

A really nice solo version of the Sino-Japanese

Here is an excellent version of the whole chapter chanted solo in Sino-Korean. The verse part starts at 12m 3s: