Hadith.1226 - Safwan ibn Yahya narrated from Ali ibn Yaqtin who said:
"I asked Imam Abu al-Hasan عليه السلام about the Jumu’ah prayer while traveling. What should I recite in them?"
Imam عليه السلام said: "Recite in them 'Qul Huwa Allahu Ahad' (Surah Al-Ikhlas)."