The ruling when it is impossible to return a sa' of dates in the form of a pledge because it is not known in the country – Comments on al-Kafi
Machine translationRead the Arabic original
The Shaykh : Now? Hmm? Well, yes. It appears that in this case, if the people of this place do not eat dates, it reverts to its value, or they give a similar food item.
Source
قناة «فضيلة الشيخ محمد بن صالح العثيمين»، [4181] الحكم عند تعذر رد صاع التمر في التصرية لأنه غير معروف في البلد-تعليقات على الكافي لابن عثيمين — youtube.com
The Arabic text is a machine transcription of the audio recording.