Muwatta Malik 1201

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّهُ كَانَ يَقُولُ لِكُلِّ مُطَلَّقَةٍ مُتْعَةٌ إِلاَّ الَّتِي تُطَلَّقُ وَقَدْ فُرِضَ لَهَا صَدَاقٌ وَلَمْ تُمَسَّ فَحَسْبُهَا نِصْفُ مَا فُرِضَ لَهَا ‏.‏

Yahya related to me from Malik from Nafi that Abdullah ibn Umar said, "Every divorced woman has compensation except for the one who is divorced and is allocated a bride-price and has not been touched. She has half of what was allocated to her

Reference

Muwatta Malik 1201

In-book

Book 29, Hadith 10