Surah At-Tawbah 9:124

وَإِذَا مَآ أُنزِلَتْ سُورَةٌ فَمِنْهُم مَّن يَقُولُ أَيُّكُمْ زَادَتْهُ هَـٰذِهِۦٓ إِيمَـٰنًا ۚ فَأَمَّا ٱلَّذِينَ ءَامَنُوا۟ فَزَادَتْهُمْ إِيمَـٰنًا وَهُمْ يَسْتَبْشِرُونَ

And whenever a sūrah is revealed, there are among them [i.e., the hypocrites] those who say, "Which of you has this increased in faith?" As for those who believed, it has increased them in faith, while they are rejoicing.

Translation: Saheeh International

Tafsir

And whenever a sūra of the Qur’ān is revealed there are some of them that is the hypocrites who say to their companions mockingly ‘Which of you has this increased in faith?’ and God says As for those who believe it has increased them in faith because they accept that it is true and they rejoice because of it.

Excerpt from Tafsir al-Jalalayn, commentary on 9:124, via Quran.com. The reader has the full commentary and 9 more tafsirs.