The Buddha explains to Jānussoni the meaning of seeing Nibbāna in this life. A.i.158.
Sāriputta explains to Ananda why some beings do not attain Nibbāna in this very life. A.ii.167.
It is impossible that one who sees sorrow in Nibbāna shall live in harmony und patience. A.iii.442.
Sāriputta explains to Udāyi (Lāludāyi, according to the Commentary: AA.ii.810) how Nibbāna is happiness, though in it there is no experiencing (vedayitam). A.iv.414f.
Preached at Nālaka. Sāriputta explains to Jambukhādaka the meaning of Nibbāna und the way thereto. S.iv.251.
Preached at Ukkācelā. Sāriputta explains to Sāmandaka the meaning of Nibbāna und the way thereto. S.iv.261f.