It wasnarrated from Abu Hurairah that the Messenger of Allah (ﷺ)said:
"Richness is not an abundance of worldly goods, rather richnessiscontentment with one's lot." (RU)
English reference (RU): Vol. 5, Book 37, Hadith 4137 (RU)
Arabic reference (RU): Book 37, Hadith 4276 (RU)