Surah Ar-Rum 30:39

وَمَآ ءَاتَيْتُم مِّن رِّبًا لِّيَرْبُوَا۟ فِىٓ أَمْوَٰلِ ٱلنَّاسِ فَلَا يَرْبُوا۟ عِندَ ٱللَّهِ ۖ وَمَآ ءَاتَيْتُم مِّن زَكَوٰةٍ تُرِيدُونَ وَجْهَ ٱللَّهِ فَأُو۟لَـٰٓئِكَ هُمُ ٱلْمُضْعِفُونَ

And whatever you give for interest [i.e., advantage] to increase within the wealth of people will not increase with Allāh. But what you give in zakāh, desiring the face [i.e., approval] of Allāh - those are the multipliers.

Translation: Saheeh International

Tafsir

And what you give in usury — such as when something is given as a gift or a present for the purpose of demanding more in return; it the practice of usury ribā is referred to by the same noun denoting that illicit ‘extra’ ziyāda requested in the financial transaction — that it may increase the wealth of the people …

Excerpt from Tafsir al-Jalalayn, commentary on 30:39, via Quran.com. The reader has the full commentary and 9 more tafsirs.