It wasnarrated from 'Abdullah bin Abi Umamah Al-Harithi that hisfathersaid:
"The Messenger of Allah (ﷺ) said: 'Simplicity is partoffaith.'" (ID)
English reference (ID): Vol. 5, Book 37, Hadith 4118 (ID)
Arabic reference (ID): Book 37, Hadith 4257 (ID)