It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that once the Prophet (peace and blessings be upon him) said: "A man will come to you who sees with the eye of Satan." After a short while, a man with a bluish complexion came and said, "O Muhammad! (peace and blessings be upon him) Why did you speak ill of me?" and he began to swear an oath about it. Regarding this dispute, this verse was revealed: «﴿وَيَحْلِفُونَ عَلَى الْكَذِبِ وَهُمْ يَعْلَمُونَ﴾ [المجادلة: 14] » "They swear oaths to a lie and they do not even realize."