إِنَّهُ يَعْلَمُ الْجَهْرَ مِنَ الْقَوْلِ وَيَعْلَمُ مَا تَكْتُمُونَ (110)
(21:110) You should, however, note it well that Allah has the knowledge of what is uttered aloud and also of what you talk about secretly. *102
*102) This refers to their secret schemes, plots and their whispering campaign which have been mentioned in v. 3. There, too, the Prophet had said, "My Lord has the knowledge of everything that is said in the heavens or the earth for He is All-Hearing, All-Knowing". (v. 4). This was to warn them that they would be taken to task for these things, too.