It was narrate from Abu Salih that: a man form among the companions of the Prophet (ﷺ) told him, he said: "O Messenger of Allah we cannot buy Saihani dates or 'idhq dates for the same amount of mixed dates (which are of inferior quality). Should we increase (the amount we give in payment for the better quality dates)?" The messenger of Allah said: "Sell them for silver them buy with it"
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، قَالَ حَدَّثَنَا أَبُو الأَحْوَصِ، عَنِ الأَعْمَشِ، عَنْ حَبِيبِ بْنِ أَبِي ثَابِتٍ، عَنْ أَبِي صَالِحٍ، أَنَّ رَجُلاً، مِنْ أَصْحَابِ النَّبِيِّ صلى الله عليه وسلم أَخْبَرَهُ قَالَ يَا رَسُولَ اللَّهِ إِنَّا لاَ نَجِدُ الصَّيْحَانِيَّ وَلاَ الْعِذْقَ بِجَمْعِ التَّمْرِ حَتَّى نَزِيدَهُمْ . فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " بِعْهُ بِالْوَرِقِ ثُمَّ اشْتَرِ بِهِ " .
sunnah.com