shvaa the dog, yuva a robust youth and the strong king of gods Maghavan the Indra.

काचं मणिं काञ्चनमेकसूत्रे मुग्धा निबध्नन्ति किमत्र चित्रम् ।विचारवान् पाणिनिरेकसूत्रे श्वानं युवानं मघवानमाह ॥

kācaṃ maṇiṃ kāñcanamekasūtre mugdhā nibadhnanti kimatra citram ।vicāravān pāṇinirekasūtre śvānaṃ yuvānaṃ maghavānamāha ॥

The aphorism of the great grammarian Paninin Shva-yuva-maghonam ataddhite" (6.4.133).श्वयुवमघोनामतद्धिते" ( ६।४।१३३)।

assigns identical suffix formation for three entities that have too much of dissimilarity. shvaa the dog, yuva a robust youth and the strong king of gods Maghavan the Indra.

The poet visualizes a young girl making a garland with glass pieces, pieces of precious gems and beads of gold all tied to the same thread

He finds some solace in the fact that the greatest scholar and grammarian Panini chose to put together.. shvaa,yuvaa and maghavaa in the same thread

There is another chatuslokam

शुनेव यूना प्रसभं मघोना प्रधर्शिता गौत्मधर्मपत्नी ।

विचारवान् पाणिनिरेकसूत्रे श्वानं युवानं मघवानमाह ॥

Like a dog (shuna) , Maghona (Indra) in theguise of a yoona(youth) sneaked into the hermitage of Gautama and indulged in illicit overtures with Ahaly the wife of Gutama. Thus the union of dog youth and Indra is revealed.. Perhaps Panini was thinking of the episode when he crafterd the thread tying together a dog youth and Indra