“Abu ‘Abd Allah (a.s.), has said, ‘Once we were sitting and my father was with the governor of banu ‘Umayyah over the people of al-Madinah. My father came back and sat down and said, “I was in the court of this (governor) a little while ago and people asked about Taqsir (reducing Salah (prayer) on a journey after traveling a certain distance). Someone said that it is at three. Another one said that it is after traveling one day and one night. Yet another said that it is one rawhah. He (the Governor) then asked me and I said, ‘When Jibril came with Taqsir (reducing Salah (prayer) on a journey after traveling a certain distance) to the Messenger of Allah, the Holy prophet asked him, “At what distance is this?” He (Jibril) said, “It is at one barid.” He (the Messenger of Allah) asked, “What is that?” Jibril replied, “It is between the shadow of ‘Ayr (a certain mountain) to the shadow of 0‘Ayr.”’ He (the Imam) said that time passed, then it was seen that banu ‘Umayyah had placed marks on the road and mentioned what Abu Ja‘far (a.s.), had spoken of. They placed signs on the shadow of ‘Ayr and the outline of 0‘Ayr. They then divided it into twelve miles and it was three thousand and five hundred yards for each mile. They had placed signs on them. When banu Hashim appeared they changed the affairs of banu ‘Umayyah in a certain way because Hadith is from banu Hashim, thus they placed a sign next to each sign.’” (the Arabic word for yard is Dhira‘ (from the elbow to the tip of the fingers which is about eighteen inches)).