Anas reported: The Messenger of Allah, peace and blessings be upon him, passed by some people grafting trees. The Prophet said, “It would be better if you did not do that.” They abandoned the practice, but there was a decline in the yield. The Prophet passed by again, and he said, “What is wrong with your trees?” They said, “You said not to do so.” The Prophet said, “You know better the affairs of your world.”
Source: Ṣaḥīḥ Muslim 2363
Grade: Sahih (authentic) according to Muslim
عَنْ أَنَسٍ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَرَّ بِقَوْمٍ يُلَقِّحُونَ فَقَالَ لَوْ لَمْ تَفْعَلُوا لَصَلُحَ قَالَ فَخَرَجَ شِيصًا فَمَرَّ بِهِمْ فَقَالَ مَا لِنَخْلِكُمْ قَالُوا قُلْتَ كَذَا وَكَذَا قَالَ أَنْتُمْ أَعْلَمُ بِأَمْرِ دُنْيَاكُمْ
2363 صحيح مسلم كتاب الفضائل باب وجوب امتثال ما قاله شرعا دون ما ذكره من معايش الدنيا على سبيل الرأي