Narrated Anas [may Allah be pleased with him]:
"The Messenger of Allah (ﷺ) gave me my Kunyah because of a plant that I used to care for." (JA)
English reference (JA): Vol. 1, Book 46, Hadith 3830 (JA)
Arabic reference (JA): Book 49, Hadith 4201 (JA)