Ibn Kathir wrote, quoting al Imaad (a Historian who was at the service of Salah ud din):
فَاتَّفَقَ أَنَّ بَعْضَهَمْ أَخَذَ صَبِيًّا رَضِيعًا مِنْ مَهْدِهِ ابْنَ ثَلَاثَةِ أَشْهُرٍ، فَوَجَدَتْ عليه أمه وجدا شديدا، وَاشْتَكَتْ إِلَى مُلُوكِهِمْ فَقَالُوا لَهَا:
إِنَّ سُلْطَانَ الْمُسْلِمِينَ رَحِيمُ الْقَلْبِ، وَقَدْ أَذِنَّا لَكِ أَنْ تَذْهَبِي إِلَيْهِ فَتَشْتَكِي أَمْرَكِ إِلَيْهِ، قَالَ الْعِمَادُ فجاءت إلى السلطان فَأَنْهَتْ إِلَيْهِ حَالَهَا، فَرَقَّ لَهَا رِقَّةً شَدِيدَةً حتى دمعت عينه. ثم أمر بِإِحْضَارِ وَلَدِهَا فَإِذَا هُوَ قَدْ بِيعَ فِي السُّوقِ، فَرَسَمَ بِدَفْعِ ثَمَنِهِ إِلَى الْمُشْتَرِي، وَلَمْ يَزَلْ وَاقِفًا حَتَّى جِيءَ بِالْغُلَامِ فَأَخَذَتْهُ أُمُّهُ وَأَرْضَعَتْهُ سَاعَةً وَهِيَ تَبْكِي مِنْ شِدَّةِ فَرَحِهَا وشوقها إليه، ثم أمر بحملها إلى خيمتها على فرس مكرمة رحمه الله تعالى وعفا عنه.
One of them (Muslim) kidnapped a three months old child, the mother felt really sad and asked help from christian leaders. They said:
The Sultan of Muslims is very soft-hearted, we have informed you so go and take your case in his court.
al Imaad said: She came to the Sultan and informed him about her case, He felt sorry while tears were in his eyes. He ordered to find her child and found out that he was sold out. He ordered to give the money to the buyer and stayed their until the child came. The mother breast fed and wept due to her love for the child. The Sultan ordered to take her to her place honorably. May Allah have mercy on him and forgive his mistakes. [Al Bidaya wal Nihaya 12/342]