It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "The Friday (prayer) is not obligatory upon a traveller."
This hadith was narrated from Nafi' (may Allah have mercy on him) only by his son Abdullah (may Allah have mercy on him), and Abu Bakr al-Hanafi (may Allah have mercy on him) is alone in narrating it.
Hadith Referenceالمعجم الأوسط / باب الألف / 818
Hadith Takhrij«أخرجه البيهقي فى «السنن الكبرى» برقم: 5721، والدارقطني فى «سننه» برقم: 1582، وعبد الرزاق فى «مصنفه» برقم: 5198، 5326، 5324، وابن أبي شيبة فى «مصنفه» برقم: 5069، 5072، 5137»