When these two garrison cities were conquered, the people came to Umar and said, "Commander of the Believers, the Messenger of Allah ﷺ designated Qarn as the station for the people of Najd, but it lies off our route, and if we were to head for Qarn it would cause us hardship."He replied, "Then look for a point on your own route that is parallel to it."So he designated Dhat Irq as their station.
حدثني علي بن مسلم حدثنا عبد الله بن نمير حدثنا عبيد الله عن نافع
لما فتح هذان المصران أتوا عمر فقالوا يا أمير المؤمنين إن رسول الله ﷺ حد لأهل نجد قرنا وهو جور عن طريقنا وإنا إن أردنا قرنا شق علينا قال فانظروا حذوها من طريقكم فحد لهم ذات عرق