"The Sangha of the Blessed One's disciples who have practiced well...who have practiced straight-forwardly...who have practiced methodically...who have practiced masterfully -- in other words, the four types of noble disciples when taken as pairs, the eight when taken as individual types -- they are the Sangha of the Blessed One's disciples: worthy of gifts, worthy of hospitality, worthy of offerings, worthy of respect, the incomparable field of merit for the world."-- AN XI.12
"In this community of monks there are monks who are Arahants, whose mental effluents are ended, who have reached fulfillment, done the task, laid down the burden, attained the true goal, totally destroyed the fetter of becoming, and who are released through right gnosis: such are the monks in this community of monks."In this community of monks there are monks who, with the total ending of the first set of five fetters, are due to be reborn [in the Pure Abodes], there to be totally unbound, never again to return from that world: such are the monks in this community of monks.
"In this community of monks there are monks who, with the total ending of [the first] three fetters, and with the attenuation of passion, aversion, & delusion, are once-returners, who -- on returning only one more time to this world -- will make an ending to stress: such are the monks in this community of monks.
"In this community of monks there are monks who, with the total ending of [the first] three fetters, are stream-winners, steadfast, never again destined for states of woe, headed for self-awakening: such are the monks in this community of monks."
-- MN 118
"Just as the ocean is the abode of such mighty beings as whales, whale-eaters, and whale-eater-eaters; asuras, nagas, and gandhabbas, and there are in the ocean beings one hundred leagues long, two hundred...three hundred...four hundred...five hundred leagues long; in the same way, this Doctrine and Discipline is the abode of such mighty beings as stream-winners and those practicing to realize the fruit of stream-entry; once-returners and those practicing to realize the fruit of once-returning; non-returners and those practicing to realize the fruit of non-returning; Arahants and those practicing for Arahantship...This is the eighth amazing and astounding fact about this Doctrine and Discipline."-- Ud V.5
"At any time when a noble disciple is recollecting the Sangha, his mind is not overcome with passion, not overcome with aversion, not overcome with delusion. His mind heads straight, based on the Sangha. And when the mind is headed straight, the noble disciple gains a sense of the goal, gains a sense of the Dhamma, gains joy connected with the Dhamma. In one who is joyful, rapture arises. In one who is rapturous, the body grows calm. One whose body is calmed experiences ease. In one at ease, the mind becomes concentrated."-- AN XI.12
"When you recollect the Sangha, monks, any fear, terror, or horripilation you may have will be abandoned."-- SN XI.3
"Among whatever communities or groups there may be, the Sangha of the Tathagata's disciples is considered supreme -- i.e., the four [groups of noble disciples] when taken as pairs, the eight when taken as persons. Those who have confidence in the Sangha have confidence in what is supreme; and for those with confidence in the supreme, supreme will be the result."-- Iti 90
"Monks, this assembly is free from idle chatter, devoid of idle chatter, and is established on pure heartwood: such is this community of monks, such is this assembly. The sort of assembly that is worthy of gifts, worthy of hospitality, worthy of offerings, worthy of respect, an incomparable field of merit for the world: such is this community of monks, such is this assembly. The sort of assembly to which a small gift, when given, becomes great, and a great gift greater: such is this community of monks, such is this assembly. The sort of assembly that it is rare to see in the world: such is this community of monks, such is this assembly -- the sort of assembly that it would be worth traveling for leagues, taking along provisions, in order to see."-- MN 118