1. Nakulapitā Sutta.– Nakulapitā visits the Buddha at Bhesakalāvana and asks for a teaching to comfort him since he is now old and always ailing. The Buddha advises him to train his mind. Nakulapitā, then visits Sāriputta and asks him to explain the Buddha’s teaching on this point. Sāriputta explains in detail that training of the mind implies the getting rid of thoughts of self with regard to the aggregates. S.iii.1 ﬀ.
2. Nakulapitā Sutta.– Nakulapitā visits the Buddha at Bhesakalāvana and asks him why some beings are wholly set free in this very life, while others are not. This has to do with grasping, says the Buddha, and then proceeds to explain it. S. iv.116.