Usamahbin Zaid said:
"I asked Tawus about performing voluntaryprayerwhile traveling. Al-Hasan bin Muslim bin Yannaq was sittingwith himand he said: 'Tawus told me that he heard Ibn 'Abbas say:"TheMessenger of Allah (ﷺ) enjoined prayer while a resident andprayerwhen one is traveling. We used to pray when we were residentsbothbefore and after (the obligatory prayer), and we used to praybothbefore and after (the obligatory prayer) when we weretraveling.'"
English reference: Vol. 1, Book 5, Hadith 1072
Arabic reference: Book 5, Hadith 1125