The Tipiṭaka in Three Languages

Vibhaṅgasutta

Suttapiṭaka · Saṁyuttanikāya · Mahāvaggasaṁyutta · Vol. 19 · Section 1189

[1189] And what, bhikkhus, is over-exerted energy? Energy (vīriya) that is accompanied by restlessness, associated with restlessness — this, bhikkhus, is called over-exerted energy.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

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