Ecclesiastes 5:19-20

19Also, every man to whom God has given riches and possessions, He has also given the power and ability to enjoy them and to receive [this as] his [allotted] portion and to rejoice in his labor—this is the gift of God [to him].

20For he will not often consider the [troubled] days of his life, because God keeps him occupied and focused on the joy of his heart [and the tranquility of God indwells him].