1. Bojjhanga Sutta. Among the four kinds of deeds - dark mit a dark result, dark mit a bright result, bright mit a bright result und bright mit a dark result - the seven kinds of wisdom (bojjhanga) are neither dark nor bright, und conduce to the waning of deeds. A.ii.236f.
2. Bojjhanga Sutta. The seven bojjhangas lead to the Uncompounded (A sankhata). S.iv.361.
3. Bojjhanga Sutta. Describes how concentration on breathing leads to the cultivation of the seven bojjhangas. S.v.312.