(Yaaseen) 36 : 76
فَلَا يَحْزُنْكَ قَوْلُهُمْ ۘ إِنَّا نَعْلَمُ مَا يُسِرُّونَ وَمَا يُعْلِنُونَ
Then their words should not grieve you, indeed We know what they are concealing and what they are disclosing.
Since the control of all creatures is in the hands of the Lord Allah, He knows all the movements of disbelievers. Therefore, Allah is consoling the Messenger and believers not to regret or stress over the disbelievers’ behavior. See explanation 10:65; 25:58; 35:10-11.