Hadith 14:24
Narrated Ibn 'Abbas (RA):
The Prophet (ﷺ) said to a man, "Do you see the sun?" He replied, "Yes." He said, "Give witness in a similar case [which is as clear as the sun], or leave it." [Ibn 'Adi reported it with a Da'if (weak) chain or narrators, and al-Hakim graded it Sahih (authentic), but he was mistaken].
وَعَنِ ابْنِ عَبَّاسٍ رَضِيَ اَللَّهُ عَنْهُمَا; { أَنَّ اَلنَّبِيَّ - صلى الله عليه وسلم -قَالَ لِرَجُلٍ: "تَرَى اَلشَّمْسَ ?" قَالَ: نَعَمْ. قَالَ: "عَلَى مِثْلِهَا فَاشْهَدْ, أَوْ دَعْ" } أَخْرَجَهُ اِبْنُ عَدِيٍّ بِإِسْنَادٍ ضَعِيفٍ, وَصَحَّحَهُ اَلْحَاكِمُ فَأَخْطَأ َ
Original Reference: Bulugh al-Maram 1420