Pariyāyasutta

Suttapiṭaka · Saṁyuttanikāya · Mahāvaggasaṁyutta · Vol. 19 · Section 556

[556] Bhikkhus, restlessness (uddhacca) is a hindrance (nīvaraṇa), and remorse (kukkucca) is also a hindrance; thus it comes into the summary statement as "the hindrance of restlessness and remorse." By this method, this too becomes twofold.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.