puññā-dhārā
'streams of merit'.
It is said that one produces 4 streams of merit by offering the 4 requisites
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robes,
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alms food,
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dwelling,
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medicine
to a monk who has reached the condition less deliverance of mind;
further by being filled with
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unshakable faith in the Buddha,
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his doctrine
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and community of disciples,
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and by being perfect in morality
(A.IV.51.52).
A.VIII.39 describes 4 further streams of merit.