It was narrated from Simak that the heard Musa bin Talhah bin `Ubaidullah narrating that his father said:
“I passed by some palm trees with the Messenger of Allah ﷺ and he saw some people pollinating the trees. He said: 'What are these people doing?' They said: 'They are taking something from the male part (of the plant) and putting it in the female part.' He said: 'I do not think that this will do any good.' News of that reached them, so they stopped doing it, and their yield declined. News of that reached the Prophet ﷺ and he said: 'That was only my thought. If it will do any good, then do it. I am only a human being like you, and what I think may be right or wrong. But When I tell you: “Allah (Subhanahu-wa-Taala) says,” I will never tell lies about Allah (Subhanahu-wa-Taala).' ”

حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُوسَى، عَنْ إِسْرَائِيلَ، عَنْ سِمَاكٍ، أَنَّهُ سَمِعَ مُوسَى بْنَ طَلْحَةَ بْنِ عُبَيْدِ اللَّهِ، يُحَدِّثُ عَنْ أَبِيهِ، قَالَ مَرَرْتُ مَعَ رَسُولِ اللَّهِ ﷺ فِي نَخْلٍ فَرَأَى قَوْمًا يُلَقِّحُونَ النَّخْلَ فَقَالَ " مَا يَصْنَعُ هَؤُلاَءِ " . قَالُوا يَأْخُذُونَ مِنَ الذَّكَرِ فَيَجْعَلُونَهُ فِي الأُنْثَى . قَالَ " مَا أَظُنُّ ذَاكَ يُغْنِي شَيْئًا " . فَبَلَغَهُمْ فَتَرَكُوهُ وَنَزَلُوا عَنْهَا فَبَلَغَ النَّبِيَّ ﷺ فَقَالَ " إِنَّمَا هُوَ ظَنٌّ إِنْ كَانَ يُغْنِي شَيْئًا فَاصْنَعُوهُ فَإِنَّمَا أَنَا بَشَرٌ مِثْلُكُمْ وَإِنَّ الظَّنَّ يُخْطِئُ وَيُصِيبُ وَلَكِنْ مَا قُلْتُ لَكُمْ قَالَ اللَّهُ فَلَنْ أَكْذِبَ عَلَى اللَّهِ " .