كتاب النكاح
8  
Marriage
Bulugh al-Maram 1101
Narrated 'Umar (RA):
If anyone acknowledges that he is the father of his child just for the blinking of an eye, he has no right to disown it." [al-Baihaqi reported it. The Hadith is Hasan (good) and Mawquf (saying of a Companion)].
وَعَنْ عُمَرَ ‏- رضى الله عنه ‏- قَالَ: { مَنْ أَقَرَّ بِوَلَدٍ طَرْفَةَ عَيْنٍ, فَلَيْسَ لَهُ أَنْ يَنْفِيَهُ } .‏ أَخْرَجَهُ اَلْبَيْهَقِيُّ, وَهُوَ حَسَنٌ مَوْقُوف ٌ 1‏ .‏
Reference : Bulugh al-Maram 1101
In-book reference : Book 8, Hadith 1101
English translation : Book 8, Hadith 1112
Hadith Text
Reference