Who is this younger brother in the poem ?

Once I met a drunkard in the way,
he consumes everything as elders say,
Beware of him,he staggers to cheat
and tempts the heart with beauty and wit;
He has a brother, a thief well known,
he spares nothing,not skin nor bone,
like a rat he cuts,doesn't let you know,
flies in the air like wind on the snow;
brothers twin are they,work not same,
one calls the prey,other kills the game;
one spreads the net to trap a catch,
other hunts with smile,has no match;
helpless cries the prey and laughs the elder,
breathless lies it against the younger………