Musnad Ahmad 1395

It was narrated from Moosa bin Talhah that his father said: The Messenger of Allah (ﷺ) passed by some people who were at the top of the palm trees. He said: "What are these people doing?" They said: “They are pollinating (the trees), putting the male with the female.” He said: "I do not think this can help in any way.” They were told about that and they stopped doing it. News of that reached the Messenger of Allah (ﷺ) and he said: “If it will benefit them, then let them do it. It was only a passing thought. Do not blame me for a mere thought, but if I tell you anything about Allah (may He be glorified and exalted) then accept it from me, for I will never tell a lie about Allah."