Visuddhimagga IV-160

Yā pana ‘‘kālenakālaṃ upekkhānimittaṃ manasikarotī’’ti (a. ni. 3.103) evamāgatā anaccāraddhanātisithilavīriyasaṅkhātā upekkhā, ayaṃ vīriyupekkhā nāma.

（4）「时时于舍相作意」，如是说则为称不过急不过缓的精进为舍，是名「精进舍」。

Ñ(IV,160): Equanimity of energy is a name for the equanimity otherwise known as neither over-strenuous nor over-lax energy described thus: 'From time to time he brings to mind the sign of equanimity' (A.i,257).

Notes in Chinese translation: 「精进舍」（vīriyupekkhā），《解脱道论》「精进舍」。