The Arabs derived two advantages from this method of transposition (nasi’)—one was the diverting of the Hajj season to suit commercial requirements and the other was that if fighting against an enemy had to be started in forbidden months (i.e. Muharram, Rajab, Dhu’l-Qa‘dah and Dhu’l-Hijjah), replacing a haram month by a non-haram month legitimised the opening of hostilities. Abraham’s method had formerly been the backbone of Arab tradition, but since the Arabs’ thinking was dominated by commercial considerations and tribal requirements, the nasi’ method found favour with them and they adopted it in their affairs.