The Quran

وَابتَغِ فيما آتاكَ اللَّهُ الدّارَ الآخِرَةَ ۖ وَلا تَنسَ نَصيبَكَ مِنَ الدُّنيا ۖ وَأَحسِن كَما أَحسَنَ اللَّهُ إِلَيكَ ۖ وَلا تَبغِ الفَسادَ فِي الأَرضِ ۖ إِنَّ اللَّهَ لا يُحِبُّ المُفسِدينَ

Muhammad Asad

Seek instead, by means of what God has granted thee, [the good of] the life to come,¹ without forgetting, withal, thine own [rightful] share in this world;² and do good [unto others] as God has done good unto thee; and seek not to spread corruption on earth: for, verily, God does not love the spreaders of corruption!"

I.e., by spending in charity and on good causes.
Lit., "and do not forget..., etc.: a call to generosity and, at the same time, to moderation (cf. 2:143 - "We have willed you to be a community of the middle way").