The Prophet ﷺ said: There is no prostitution in Islam. If anyone practised prostitution in pre-Islamic times, the child will be attributed to the master (of the slave-woman). He who claims his child without a valid marriage or ownership will neither inherit nor be inherited. (Using translation from Abū Dāʾūd 2264)   

أَنَّهُ قَالَ قَالَ رَسُولُ اللهِ ﷺ لَا مُسَاعَاةَ فِي الْإِسْلَامِ مَنْ سَاعَى فِي الْجَاهِلِيَّةِ فَقَدْ لَحِقَ بِعَصَبَتِهِ وَمَنِ ادَّعَى وَلَدًا مِنْ غَيْرِ رِشْدَةٍ فَلَا يَرِثُ وَلَا يُورَثُ  

The Prophet ﷺ decided regarding one who was treated as a member of a family after the death of his father, to whom he was attributed when the heirs said he was one of them, that if he was the child of a slave-woman whom the father owned when he had intercourse with her, he was included among those who sought his inclusion, but received none of the inheritance which was previously divided; he, however, received his portion of the inheritance which had not already been divided; but if the father to whom he was attributed had disowned him, he was not joined to the heirs. If he was a child of a slave-woman whom the father did not possess or of a free woman with whom he had illicit intercourse, he was not joined to the heirs and did not inherit even if the one to whom he was attributed is the one who claimed paternity, since he was a child of fornication whether his mother was free or a slave. (Using translation from Abū Dāʾūd 2265)   

أَنَّ رَسُولَ اللهِ ﷺ قَضَى أَنَّ كُلَّ مُسْتَلْحَقٍ اسْتُلْحِقَ بَعْدَ أَبِيهِ الَّذِي يُدْعَى إِلَيْهِ فَادَّعَاهُ وَرَثَتُهُ مِنْ بَعْدُ فَقَضَى إِنْ كَانَ مِنْ أَمَةٍ يَمْلِكُهَا يَوْمَ أَصَابَهَا فَقَدْ لَحِقَ بِمَنِ اسْتَلْحَقَهُ لَيْسَ لَهُ فِيمَا قُسِمَ قَبْلَهُ مِنَ الْمِيرَاثِ شَيْءٌ وَمَنْ أَدْرَكَ الْمِيرَاثَ لَمْ يُقْسَمْ فَلَهُ نَصِيبُهُ وَلَا يَلْحَقُ إِذَا كَانَ أَبُوهُ الَّذِي يُدْعَى لَهُ أَنْكَرَهُ فَإِنْ كَانَ مِنْ أَمَةٍ لَا يَمْلِكُهَا أَوْ مِنْ حُرَّةٍ عَاهَرَ بِهَا فَإِنَّهُ لَا يَلْحَقُ وَلَا يَرِثُ وَإِنْ كَانَ أَبُوهُ الَّذِي يُدْعَى لَهُ هُوَ ادَّعَاهُ فَهُوَ وَلَدُ زِنًا لِأَهْلِ أُمِّهِ مَنْ كَانُوا حُرَّةً أَوْ أَمَةً 12505 وَأَخْبَرَنَا أَبُو عَلِيٍّ الرُّوذْبَارِيُّ أنا مُحَمَّدُ بْنُ بَكْرٍ ثنا أَبُو دَاوُدَ ثنا مَحْمُودُ بْنُ خَالِدٍ ثنا أَبِي عَنْ مُحَمَّدِ بْنِ رَاشِدٍ بِإِسْنَادِهِ وَمَعْنَاهُ وَزَادُوا ذَلِكَ فِيمَا اسْتُلْحِقَ فِي أَوَّلِ الْإِسْلَامِ فَمَا اقْتُسِمَ مِنْ مَالٍ قَبْلَ الْإِسْلَامِ فَقَدْ مَضَى