The recommendation to make supplication during the journey

Riyad as-Salihin (The Meadows of the Righteous)

by Imam Nawawi

172. Chapter: The recommendation to make supplication during the journey

980. Abu Hurayra reported that the Messenger of Allah, may Allah bless him and grant him peace, said, "Three supplications will be answered without a doubt: the supplication of someone who is wronged, the supplication of a traveller and the supplication of a parent for his child." [Abu Dawud and at-Tirmidhi]