an ats . ▁For ▁example , ▁according ▁to ▁the ▁“ In c idents ▁of ▁Abd ol lah ▁bin ▁T ah ir ’ s ▁Time ” ▁written ▁by ▁Gard izi , ▁in ▁the ▁year ▁ 8 3 0 ▁AD ▁a ▁terrible ▁earth qu ake ▁struck ▁the ▁town ▁of ▁F org h ane h ▁and ▁reduced ▁many ▁homes ▁to ▁rub ble . ▁The ▁inhabitants ▁of ▁N ey sh ab oor ▁used ▁to ▁come ▁to ▁Abd ol lah ▁bin ▁T ah ir ▁in ▁order ▁to ▁request ▁him ▁to ▁interven e , ▁for ▁they ▁fought ▁over ▁their ▁q an ats ▁and ▁found ▁the ▁relevant ▁instruction ▁or ▁law ▁on ▁q an at ▁as ▁a ▁solution ▁neither ▁in ▁the ▁proph et ' s ▁quot ations ▁nor ▁in ▁the ▁cler ics ’ ▁writ ings . ▁So ▁Abd ol lah ▁bin ▁T ah ir ▁managed ▁to ▁bring ▁together ▁all ▁the ▁cl erg ymen ▁from ▁throughout ▁K hor as an ▁and ▁Ira q ▁to ▁compile ▁a ▁book ▁entitled ▁“ Al gh ani ” ▁( The ▁Book ▁of ▁Q an at ). ▁This ▁book ▁collected ▁all ▁the ▁r ul ings ▁on ▁q an ats ▁which ▁could ▁be ▁of ▁use ▁to ▁who ever ▁wanted ▁to ▁judge ▁a ▁dispute ▁over ▁this ▁issue . ▁Gard izi ▁added ▁that ▁this ▁book ▁was ▁still ▁applicable ▁to ▁his ▁time , ▁and ▁everyone ▁made ▁references ▁to ▁this ▁book . ▁ ▁One ▁can ▁dedu ce ▁from ▁these ▁facts ▁that ▁during ▁the ▁above - ment ioned ▁period ▁the ▁number ▁of ▁q an ats ▁was ▁so ▁considerable ▁that ▁the ▁authorities ▁were ▁prompt ed