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." (ID)
English reference (ID): Vol. 5, Book 37, Hadith 4137 (ID)
Arabic reference (ID): Book 37, Hadith 4276 (ID)