It is narrated from Sayyidah Aishah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) used to pray both shortened and complete prayers while travelling, and he would fast and also break his fast.
Ali (al-Daraqutni) said: This chain is sahih (authentic). The Shaykh said: It has supporting reports from the narrations of Dalham bin Salih, al-Mughirah bin Ziyad and Talhah bin Amr, and all of them are da'if (weak).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5422