﴿ يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوا۟ لَا تَأْكُلُوا۟ ٱلرِّبَوٰٓا۟ أَضْعَٰفًۭا مُّضَٰعَفَةًۭ ۖ وَٱتَّقُوا۟ ٱللَّهَ لَعَلَّكُمْ تُفْلِحُونَ ﴾

“O YOU who have attained to faith! Do not gorge yourselves on usury, doubling and re-doubling it - but remain conscious of God, so that you might attain to a happy state;”

Please check ayah 3:136 for complete tafsir.