Bhagavatapurana 1.4.26

1.4.26

evaṃ pravṛttasya sadā bhūtānāṃ śreyasi dvijāḥ /
sarvātmakenāpi yadā nātuṣyaddhṛdayaṃ tataḥ //

26. O Brahmin, though he was always working thus for the good of beings with many objects in view, Vyasa's heart was not satisfied; he sat on the holy bank of the Saraswati with a mind and heart not quite serene;