Read and reflect on verse 518 from Surah An-Nisaa: And as for those of you who, owing to circumstances, are not in a position to marry free believing women, [let them marry] believing maidens from amo...
وَمَنْ لَمْ يَسْتَطِعْ مِنْكُمْ طَوْلًا أَنْ يَنْكِحَ الْمُحْصَنَاتِ الْمُؤْمِنَاتِ فَمِنْ مَا مَلَكَتْ أَيْمَانُكُمْ مِنْ فَتَيَاتِكُمُ الْمُؤْمِنَاتِ ۚ وَاللَّهُ أَعْلَمُ بِإِيمَانِكُمْ ۚ بَعْضُكُمْ مِنْ بَعْضٍ ۚ فَانْكِحُوهُنَّ بِإِذْنِ أَهْلِهِنَّ وَآتُوهُنَّ أُجُورَهُنَّ بِالْمَعْرُوفِ مُحْصَنَاتٍ غَيْرَ مُسَافِحَاتٍ وَلَا مُتَّخِذَاتِ أَخْدَانٍ ۚ فَإِذَا أُحْصِنَّ فَإِنْ أَتَيْنَ بِفَاحِشَةٍ فَعَلَيْهِنَّ نِصْفُ مَا عَلَى الْمُحْصَنَاتِ مِنَ الْعَذَابِ ۚ ذَٰلِكَ لِمَنْ خَشِيَ الْعَنَتَ مِنْكُمْ ۚ وَأَنْ تَصْبِرُوا خَيْرٌ لَكُمْ ۗ وَاللَّهُ غَفُورٌ رَحِيمٌ
And as for those of you who, owing to circumstances, are not in a position to marry free believing women, [let them marry] believing maidens from among those whom you rightfully possess. And God knows all about your faith; each one of you is an issue of the other. Marry them, then, with their people's leave, and give them their dowers in an equitable manner - they being women who give themselves in honest wedlock, not in fornication, nor as secret love-companions. And when they are married, and thereafter become guilty of immoral conduct, they shall be liable to half the penalty to which free married women are liable. This [permission to marry slave-girls applies] to those of you who fear lest they stumble into evil. But it is for your own good to persevere in patience [and to abstain from such marriages]: and God is much-forgiving, a dispenser of grace.