Required Length of Distance of a Journey for Shortened Salah (Prayer)

2. It is a narration from him (narrator of previous Hadith) by his father from Ibn Abi ‘Umayr from abu Ayyub who has said the following: “I once asked abu ‘Abd Allah عليه السلام, about the minimum distance after the traveling of which a traveler reduces his Salah (prayer). He (the Imam) said, ‘It is one barid.’”