Musannaf Ibn Abi Shayba 21:310

Yazid ibn Harun narrated to us, he said: Hisham ibn Abdullah informed me, from Yahya ibn Abi Kathir, from Abu al-Darda’, who said: "That I should perform one hundred tasbihs (sayings of 'Subhan Allah') is more beloved to me than that I should give one hundred dinars in charity to the poor."