To bind
'acar (aw-sar')
to yoke or hitch; by analogy, to fasten in any sense, to join battle
his princes
sar (sar)
a head person (of any rank or class) -- captain (that had rule), chief (captain), general, governor, keeper, lord, (-task-)master, prince(-ipal), ruler, steward.
at his pleasure
nephesh (neh'-fesh)
a breathing creature, i.e. animal of (abstractly) vitality; used very widely in a literal, accommodated or figurative sense (bodily or mental)
and teach his senators
zaqen (zaw-kane')
old -- aged, ancient (man), elder(-est), old (man, men and...women), senator.
wisdom
chakam (khaw-kam')
exceeding, teach wisdom, be (make self, shew self) wise, deal (never so) wisely, make wiser.