Garudapurana 3.3.41

3.3.41

garuḍa uvāca /
he kṛṣṇa he mādhava sāttvatāṃ pate padārthānāṃ caramāṃśaḥ parāṇu //

Garuḍa said: / O Kṛṣṇa, O Mādhava, O Lord of the Sāttvatas, it is said that the ultimate part of substances is the ultimate atom;