Had you gives her to your maternal uncles, you would have a greater reward. (Using translation from Muslim 999)

أَنَّهَا أَعْتَقَتْ وَلِيدَةً فِي زَمَانِ رَسُولِ اللَّهِ ﷺ فَذَكَرَتْ ذَلِكَ لِرَسُولِ اللَّهِ ﷺ فَقَالَ «لَوْ أَعْطَيْتِهَا أَخْوَالَكِ كَانَ أَعْظَمَ لِأَجْرِكِ»