Ramayana
प्रयत्नं महदास्थाय क्रियतामस्य निग्रहः । कामं लोकास्त्रयस्सेन्द्रास्ससुरासुरमानवाः ॥ ५-४६-१३
'You have to put in extraordinary effort to capture him by acting in a suitable manner. (Even) Indra, suras, asuras and humans and the three worlds together . - ॥ 5-46-13॥
english translation
prayatnaM mahadAsthAya kriyatAmasya nigrahaH । kAmaM lokAstrayassendrAssasurAsuramAnavAH ॥ 5-46-13
hk transliteration by Sanscript