Hadith 1455B1

قَالَ يَحْيَى : سَمِعْتُ مَالِكًا، يَقُولُ : الْأَمْرُ الْمُجْتَمَعُ عَلَيْهِ عِنْدَنَا أَنَّ الْهِبَةَ إِذَا تَغَيَّرَتْ عِنْدَ الْمَوْهُوبِ لَهُ لِلثَّوَابِ بِزِيَادَةٍ أَوْ نُقْصَانٍ، فَإِنَّ عَلَى الْمَوْهُوبِ لَهُ أَنْ يُعْطِيَ صَاحِبَهَا قِيمَتَهَا يَوْمَ قَبَضَهَا
Imam Malik, may Allah have mercy on him, said: In our view, this ruling is agreed upon that when there is some difference in the gifted item due to increase or decrease, and the gift is such that it was given in exchange for something, then the recipient of the gift will have to pay its price according to the day it was taken into possession.
Hadith Reference موطا امام مالك رواية يحييٰ / كتاب الرهون / 1455B1
Hadith Takhrij «فواد عبدالباقي نمبر: 36 - كِتَابُ الْأَقْضِيَةِ-ح: 42»