Trung Bộ Kinh (Majjhima Nikaya) 5:197
SUJATOTaṁ, bhikkhave, attavādupādānaṁ upādiyetha, yaṁsa attavādupādānaṁ upādiyato na uppajjeyyuṁ sokaparidevadukkhadomanassupāyāsā.
It would make sense to grasp at a theory of self that didn’t give rise to sorrow, lamentation, pain, sadness, and distress.