ation , ▁as ▁reported ▁by ▁Mov s es : ▁ ▁Sie ge ▁of ▁T bil isi ▁▁ ▁The ▁next ▁objective ▁of ▁the ▁Turk ic - By z antine ▁off ensive ▁was ▁the ▁Kingdom ▁of ▁I ber ia , ▁whose ▁r uler ▁Ste phan us ▁was ▁a ▁trib ut ary ▁to ▁Kh os row ▁II . ▁In ▁the ▁words ▁of ▁Mov s es ▁K ag ank at vat si , ▁the ▁Kh az ars ▁" enc irc led ▁and ▁bes ie ged ▁the ▁famous ▁and ▁great ▁sy bar it ic ▁trade ▁city ▁of ▁T bil isi ," ▁where up on ▁they ▁were ▁joined ▁by ▁Emperor ▁Her ac lius ▁with ▁his ▁mighty ▁army . ▁▁ ▁Her ac lius ▁and ▁T ong ▁Y ab g hu ▁( called ▁Zie bel ▁in ▁the ▁By z antine ▁sources ) ▁met ▁under ▁the ▁walls ▁of ▁Nar ik ala . ▁The ▁y ab gu ▁rode ▁up ▁to ▁the ▁em peror , ▁kiss ed ▁his ▁shoulder ▁and ▁made ▁a ▁bow . ▁In ▁return , ▁Her ac lius ▁h ug ged ▁the ▁bar bar ian ▁r uler , ▁called ▁him ▁his ▁son , ▁and ▁crown ed ▁him ▁with ▁his ▁own ▁dia dem . ▁During ▁the ▁en su ing ▁fe ast ▁the ▁Kh azar ▁leaders ▁received ▁am ple ▁g ifts ▁in ▁the ▁shape ▁of ▁ear r ings ▁and ▁clothes , ▁while ▁the ▁y ab g hu ▁was ▁promised ▁the ▁hand ▁of ▁the ▁em peror ' s ▁daughter , ▁E ud ox ia ▁E pi ph ania . ▁ ▁The ▁sie ge ▁drag ged