Surah Al-Hijr 15:97

وَلَقَدْ نَعْلَمُ أَنَّكَ يَضِيقُ صَدْرُكَ بِمَا يَقُولُونَ

And We already know that your breast is constrained by what they say.

Translation: Saheeh International

Tafsir

And verily wa-laqad is for confirmation We know that your breast is at times oppressed by what they say in the way of mockery and denial.

Excerpt from Tafsir al-Jalalayn, commentary on 15:97, via Quran.com. The reader has the full commentary and 9 more tafsirs.