“Truly fatigue has overwhelmed us on our journey” said Musa alayhi assalam to his travel companion as they searched for al-Khadir alayhi assalam.

Al-Qushayri says:

In this journey Musa was the one who carried a burden. It was a journey to learn proper behaviour (ta’deeb) and to endure difficulty because he had gone to ask for greater knowledge, and the state (haal) of seeking knowledge is the state (haal) of learning proper behavior (ta’deeb) and a time for bearing difficulty. Because of this he was overwhelmed by hunger and said, “Truly fatigue has overwhelmed us on our journey.”

- Kristin Zahra Sands, Sufi Commentaries on the Quran in Classical Islam, p. 88-89