The Anagamin

"The people of the third category are those of the stage of Anagamim. With them there can never be such things as slandering the Wonderful Dharma, keeping servants, male or female, having impure things, or keeping the books (scriptures) of the Tirthikas, being hindered by foreign illusions, or being tied by various old illusions, keeping for himself the true sharira [relic] of the Tathagata, getting attacked by (secular) illnesses or the four great poisonous serpents [greed, anger, ignorance and arrogance], and persisting upon self. They talk about selflessness, but never talk about, or cling to, worldly things. They talk speak, and uphold the Mahayana, but their bodies are never infected by the 80,000 germs. They remove forever the sensual appetite, and even in their dreams, they never ejaculate impure things. At the last moment of their lives, they never feel fear. What does 'Anagamim'? It means that this person never comes back (to rebirth) or backward. As already stated, no failures or illnesses ever catch hold to him. It goes, returns and circulates around. It is called Bodhisattva. Receiving his prophecy [to Buddhahood], not long after that, it attains unsurpassed Enlightenment. This is the person of the third category."

Read more in Nirvana Sutra – Chapter 8 – On The Four Dependables.