The Thunder - 13:10 Whether you conceal the Word or reveal it, whether you hide it in the darkness of the night or come out in the daytime, it is one for Him. Whether you conceal the Word or reveal it, whether you hide it in the darkness of the night or come out in the daytime, it is one for Him.
Questions to the Verse (2)
Allah knows everything:
It also refers to the hypocrites who harbor secret and evil thoughts and plans against Allah and His Messenger:

Write your own questions to this verse or your suggestions and criticisms about these questions