7 · Bible
73 · New Testament
73C · public life of Christ: from his baptism until the Passion
73C8 · Christ as teacher (part II): parables and proverbial sayings of Christ
73C81 · parables and proverbial sayings of Christ ~ agriculture
73C813 ·
the mustard seed becomes a tree in which birds make nests (Matthew 13:31-32; Mark 4:31-32; Luke 13:18-19)