Allah has forbidden usury

Allah SWT said:

وَأَخْذِهِمُ الرِّبٰوا وَقَدْ نُهُوا عَنْهُ وَأَكْلِهِمْ أَمْوٰلَ النَّاسِ بِالْبٰطِلِ ۚ وَأَعْتَدْنَا لِلْكٰفِرِينَ مِنْهُمْ عَذَابًا أَلِيمًا

"And [for] their taking of usury while they had been forbidden from it, and their consuming of the people's wealth unjustly. And we have prepared for the disbelievers among them a painful punishment."

(Quran, Surah An-Nisaa 4: Verse 161)