增壹阿含經 12.1.p2

12.1.p2

It was then that the Bhagavān addressed the monks, “There’s a single-entry path that purifies the conduct of sentient beings and rids them of grief. When they lack afflictions, they attain great wisdom and achieve realization of nirvāṇa. That is to say, they cease the five hindrances and contemplate four abodes of mindfulness.