Cundī dhāraṇī or mantra also to start with appeared in the Kāraṇḍavyūhasūtra: namaḥ saptānāṃ samyaksaṃbuddha koṭīnāṃ tadyathā oṃ cale cule cunde svāhā The usage of mantra or the repetition of selected phrases in Pali is really a remarkably common kind of meditation during the Theravada tradition. Basic mantras use repetition https://www.youtube.com/@Mahavidyabaglamukhi/