Sahih al-Bukhari - Book 78, Hadith 228
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Narrated Sahl bin Sa`d: The most beloved names to `Ali was Abu Turab, and he used to be pleased when we called him by it, for none named him Abu Turab (for the first time), but the Prophet.
Once `Ali got angry with (his wife) Fatima, and went out (of his house) and slept near a wall in the mosque. The Prophet (ﷺ) came searching for him, and someone said, "He is there, Lying near the wall."
The Prophet (ﷺ) came to him while his (`Ali's) back was covered with dust. The Prophet (ﷺ) started removing the dust from his back, saying, "Get up, O Abu Turab!"
Once `Ali got angry with (his wife) Fatima, and went out (of his house) and slept near a wall in the mosque. The Prophet (ﷺ) came searching for him, and someone said, "He is there, Lying near the wall."
The Prophet (ﷺ) came to him while his (`Ali's) back was covered with dust. The Prophet (ﷺ) started removing the dust from his back, saying, "Get up, O Abu Turab!"
How the Prophet ﷺ modelled this behaviour here
Affection Love Expression
“The Prophet (ﷺ) started removing the dust from his back, saying, 'Get up, O Abu Turab!'”
Expressing love verbally and nonverbally; showing appreciation; daily affection; romantic gestures