The eleventh book of the Khuddaka-nikāya of the Sutta-piṭaka is divided into two parts, each containing a commentary considered to be canonical.
Both the Mahāniddesa and Cullaniddesa comment on texts from the Suttanipāta. (Not later than the 1st century BCE)
- Vol IV: Index to the Mahāniddesa: L.S. Cousins, 1995. (Computer-generated index to the first part of the Niddesa)