Dutiyarahogatasutta

sn52.2:1.1 At Sāvatthī.

sn52.2:1.2 Then as Anuruddha was in private retreat this thought came to his mind:

sn52.2:1.3 “Whoever has missed out on these four kinds of mindfulness meditation has missed out on the noble path to the complete ending of suffering.

sn52.2:1.4 Whoever has undertaken these four kinds of mindfulness meditation has undertaken the noble path to the complete ending of suffering.”