Cundī dhāraṇī or mantra also very first appeared within 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 actually a really frequent sort of meditation while in the Theravada custom. Easy mantras use repetition https://www.youtube.com/@AacharyaGoldieMadan/