▁to ▁years ▁of ▁reven ge - dri ven ▁tit - for - tat ▁ra ids ▁between ▁the ▁Q ays ▁and ▁Y aman . ▁ ▁After ▁Mar j ▁Rah it , ▁the ▁Q ays ▁came ▁under ▁the ▁leadership ▁of ▁Z uf ar ▁ibn ▁al - Har ith ▁al - K il abi ▁and ▁Um ay r ▁ibn ▁al - Hub ab ▁al - S ul ami . ▁From ▁their ▁respective ▁strong holds ▁in ▁al - Q ar q isi y ah ▁and ▁Ras ▁al - A yn ▁they ▁t ena ci ously ▁fought ▁against ▁the ▁Y aman ▁and ▁resist ed ▁Um ay y ad ▁authority . ▁Most ▁batt les ▁against ▁the ▁Kal b ▁were ▁fought ▁in ▁the ▁desert ▁between ▁Sy ria ▁and ▁Ira q . ▁Um ay r ▁also ▁ent ang led ▁the ▁Q ays ▁against ▁the ▁Ban u ▁Tag h lib , ▁and ▁the ▁two ▁sides ▁fought ▁several ▁batt les ▁near ▁the ▁K hab ur , ▁Bal ikh ▁and ▁Tig ris ▁rivers . ▁Um ay r ▁was ▁killed ▁by ▁the ▁Tag h lib ▁in ▁ 6 8 9 ▁and ▁Z uf ar ▁submitted ▁to ▁Um ay y ad ▁authority ▁under ▁C ali ph ▁Abd ▁al - Mal ik ▁in ▁ 6 9 1 ▁in ▁return ▁for ▁a ▁high ▁place ▁in ▁the ▁Um ay y ad ▁court . ▁The ▁Q ays ▁were ▁strong ▁part is ans ▁of ▁the ▁powerful ▁Um ay y ad ▁govern ors ▁al - H aj j aj ▁ibn ▁Y us uf ▁of ▁Th a q if ▁and ▁Q ut ay