Surah Al-Hijr — Ayah 97 (15:97)
وَلَقَدۡ نَعۡلَمُ أَنَّكَ يَضِيقُ صَدۡرُكَ بِمَا يَقُولُونَ ٩٧
English translation (Saheeh International)
And We already know that your breast is constrained by what they say.
Brief commentary
We know that your heart, O Messenger, is constrained by the rejection and mockery of you that emanates from them.