Musannaf Ibn Abi Shayba 33:806

Waki’ narrated to us, from Mis’ar, from al-Walid ibn al-‘Izar, from Abu al-Ahwas, who said: I heard him saying: A glorification (tasbih) in seeking a need is better than a milch camel in a year of drought (or he said: a year of scarcity).