﴿ قُلْ أَنفِقُوا۟ طَوْعًا أَوْ كَرْهًۭا لَّن يُتَقَبَّلَ مِنكُمْ ۖ إِنَّكُمْ كُنتُمْ قَوْمًۭا فَٰسِقِينَ ﴾

“Say: "You may spend [anything], willingly-or unwillingly, [pretending that you do it for the sake of God:] it shall never be accepted from you -for, verily, you are people bent on iniquity!"”

Please check ayah 9:54 for complete tafsir.