ENOfficial
Ibn ‘Umar reported God’s messenger as saying: “The worst lie is when a man pretends to have seen what he has not seen." Bukhari transmitted it,
Source: sunnah.com
Other translations
Arabic
وَعَنِ ابْنِ عُمَرَ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «مِنْ أَفْرَى الْفِرَى أَنْ يُرِيَ الرَّجُلُ عَيْنَيْهِ مَا لم تريا» . رَوَاهُ البُخَارِيّ
sunnah.com