Narrated Ibn 'Abbas (ra): Allah's Messenger (ﷺ) also said, "It (i.e., Makkah's) thorny bushes should not be uprooted and its game should not be chased, and picking up its fallen things is illegal except by him who makes public announcement about it, and its grass should not be cut." 'Abbas said, "O Allah's Messenger (ﷺ) ! Except Idhkhir (a kind of grass)." The Prophet (ﷺ) said, "Except Idhkhir."
Source: sunnah.com
Other translations
Arabic
وَقَالَ أَحْمَدُ بْنُ سَعِيدٍ حَدَّثَنَا رَوْحٌ، حَدَّثَنَا زَكَرِيَّاءُ، حَدَّثَنَا عَمْرُو بْنُ دِينَارٍ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ يُعْضَدُ عِضَاهُهَا، وَلاَ يُنَفَّرُ صَيْدُهَا، وَلاَ تَحِلُّ لُقَطَتُهَا إِلاَّ لِمُنْشِدٍ، وَلاَ يُخْتَلَى خَلاَهَا ". فَقَالَ عَبَّاسٌ يَا رَسُولَ اللَّهِ إِلاَّ الإِذْخِرَ. فَقَالَ " إِلاَّ الإِذْخِرَ ".
sunnah.com