1. Dukkara Sutta v.l. Kumma Sutta.– A wise monk should withdraw within himself, like the tortoise withdrawing his limbs. S.i.7.
2. Dukkarapañha Sutta.– Jambukhādaka asks Sāriputta about things that are difficult to do in the religious life. He replies that going-forth is difficult, finding delight is difficult, and practising in accordance with the Dhamma. One who can do this will soon attain Arahantship. S.iv.260,
3. Dukkara Sutta.– The wanderer Sāmaṇḍaka asks the same questions of Sāriputta and gets the same answers. S.iv.262.