The Prophet ﷺ said: The child of adultery is worst of the three. Abu Hurairah said: That I give a flog in the path of Allah (as a charity) is dearer to me than emancipating a child of adultery.  

قَالَ رَسُولُ اللَّهِ ﷺ وَلَدُ الزِّنَا شَرُّ الثَّلاَثَةِ وَقَالَ أَبُو هُرَيْرَةَ لأَنْ أُمَتِّعَ بِسَوْطٍ فِي سَبِيلِ اللَّهِ ﷻ أَحَبُّ إِلَىَّ مِنْ أَنْ أَعْتِقَ وَلَدَ زِنْيَةٍ