▁is ▁probable , ▁however , ▁that ▁he ▁derived ▁his ▁knowledge ▁of ▁Bab yl onian ▁teaching ▁from ▁his ▁father , ▁who ▁had ▁tra ve led ▁in ▁Bab yl onia . ▁ ▁Jose ' s ▁chief ▁work ▁in ▁the ▁field ▁of ▁the ▁Hal akh ah ▁was ▁the ▁exp ounding ▁of ▁the ▁M ish nah ▁and ▁the ▁hal ak hot ▁of ▁the ▁Am ora im , ▁though ▁some ▁hal ak hot ▁are ▁cred ited ▁to ▁him . ▁In ▁ag g ad ah ▁he ▁excel led ▁in ▁the ▁transmission ▁and ▁el uc id ation ▁of ▁the ▁say ings ▁of ▁his ▁prede cess ors , ▁especially ▁those ▁of ▁Hi y ya , ▁Josh ua ▁ben ▁Le vi , ▁Y oh an an ▁and ▁S ime on ▁ben ▁Lak ish . ▁ ▁His ▁chief ▁hal ak ic ▁oppon ents ▁were ▁M ana ▁II ▁and ▁Jose ▁ben ▁Z eb ida . ▁ ▁References ▁ ▁Resources ▁Wald stein , ▁A . ▁and ▁Sol omon ▁Sch ech ter . ▁" Jose ▁b . ▁Ab in ". ▁Jewish ▁Encyclopedia . ▁F unk ▁and ▁W agn alls , ▁ 1 9 0 1 - 1 9 0 6 ; ▁which ▁c ites : ▁B acher , ▁Ag . ▁Pal . ▁Am or . ▁i ii . ▁ 7 2 4 ▁et ▁seq .; ▁We iss , ▁Dor , ▁i ii . ▁ 1 1 7 ▁et ▁seq .; ▁Heil pr in , ▁S eder ▁ha - D or ot , ▁ii . ▁ 2 2 4 ; ▁Frank el , ▁M eb o ,