Sayyar bin Mikhraq (may Allah have mercy on him) said: I asked Sayyiduna Ibn Umar (may Allah be pleased with them both) about the fasting of the traveller, and he said: "The Messenger of Allah (peace and blessings be upon him) set out (on a journey) when fourteen nights of Ramadan had passed. He (peace and blessings be upon him) made his riding animal kneel, placed one foot in the stirrup and the other on the ground, then he (peace and blessings be upon him) called for its milk and drank it."
No one narrated this hadith from Sayyar bin Mikhraq (may Allah have mercy on him) except Sa'd bin Aws (may Allah have mercy on him), and no one from Sa'd (may Allah have mercy on him) except Muhammad bin Dinar (may Allah have mercy on him); Sa'id bin Abi al-Rabi' (may Allah have mercy on him) is alone in this narration.
Hadith Referenceالمعجم الأوسط / باب الميم / 7510
Hadith Gradingمحدثین:إسناده ضعيف لجهالة أحد رواته
Hadith Takhrij«قال الهيثمي: فيه من لم أعرفه «مجمع الزوائد ومنبع الفوائد، ج 3، ص 160»»