Aisha reported: I was on a camel that was misbehaving, so I started to beat it. The Messenger of Allah, peace and blessings be upon him, said to me, “You must be gentle. Verily, gentleness is not in anything but that it beautifies it, and it is not removed from anything but that it disgraces it.”
Source: al-Adab al-Mufrad lil-Bukhārī 475
Grade: Sahih (authentic) according to Al-Albani
عَنْ عَائِشَةَ قَالَتْ كُنْتُ عَلَى بَعِيرٍ صَعْبٍ فَجَعَلْتُ أَضْرِبُهُ فَقَالَ لِي رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَلَيْكِ بِالرِّفْقِ فَإِنَّ الرِّفْقَ لَا يَكُونُ فِي شَيْءٍ إِلَّا زَانَهُ وَلَا يُنْزَعُ مِنْ شَيْءٍ إِلَّا شَانَهُ
475 الأدب المفرد للبخاري باب الخرق
365 المحدث الألباني خلاصة حكم المحدث صحيح في صحيح الأدب المفرد