जइ णं भंते ! समणेणं भगवया महावीरेणं जाव संपत्तेणं सत्तमस्स अंगस्स उवासगदसाणं पढमस्स अज्झयणस्स अयमट्ठे पण्णत्ते, दोच्चस्स णं भंते ! अज्झयणस्स के अट्ठे पण्णत्ते ? ॥२.१॥
O Venerable One! The meaning of the first chapter of the Upasakdashang — the seventh Anga — has been set forth. What meaning is set forth in the second chapter?
Jambu Swami asks his teacher Arya Sudharma Swami about the second chapter's content. This standard opening bridges the chapters and establishes the chain of oral transmission from Mahavira. The yāvat formula (jāva sampatteṇaṃ) stands for Mahavira's full laudatory epithet, avoiding repetition of the long canonical formula.
Simply Put: Jambu asks his teacher: 'You've explained the first chapter about Ananda — now what is the second chapter about?'