وَعَنْ أَنَسِ بْنِ مَالِكٍ رضى الله عنه
«أَنَّ اَلنَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ نَهَى عَنْ بَيْعِ اَلثِّمَارِ حَتَّى تُزْهَى. قِيلَ: وَمَا زَهْوُهَا? قَالَ: «تَحْمَارُّ وَتَصْفَارُّ»
The Prophet (sallallahu alayhi wa sallam) forbade the sale of fruits till they become colorful. He was asked what that meant, he replied, “Till they become reddish and yellowish.”.