Muhammad bin Ubaydullah said: I heard Sayyiduna Abdullah bin al-Zubayr (may Allah be pleased with him) saying: "People used to rely on one another for provisions (on the journey), so Allah Almighty commanded them to take provisions, saying: 'And take provisions, but indeed the best provision is piety' [Surah al-Baqarah: 197]."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 13894