[73] Mettaṃ upekkhanti kā uppatti? aññataro kira rājā Mettādijhānalābhī ahosi. So "jhānasukhantarāyakaraṃ rajjan"ti jhānānurakkhaṇatthaṃ rajjaṃ pahāya pabbajitvā vipassanto paccekabodhiṃ sacchikatvā imaṃ udānagāthaṃ abhāsi:-

"mettaṃ upekkhaṃ karuṇaṃ vimuttiṃ

āsevamāno muditañca kāle

sabbena lokena avirujjhamāno