Dalam bab awal Outliers oleh Malcom Gladwell, beliau menceritakan kisah Stewart Wolf yang mengkaji sebuah komuniti Itali yang diberi nama Roseto di Pennsylvania. Mereka kuat makan, ramai yang gemuk, masak menggunakan banyak lemak, tidak banyak exercise, makan banyak manisan dan perkara yang tidak menunjukkan ciri sihat.

Namun yang mengejutkan, individu bawah 65 sukar didapati menghidap penyakit jantung. Stewart Wolf sebagai seorang doktor mengkaji sebabnya. Dan rupanya rahsia itu terkandung dalam hadis Nabi – silaturahim.

Apa yang berlaku ?

They (group of researchers) saw how the Rosetans visited one another, stopping to chat in Italian on the street, say or cooking for one another in their backyards. They learned about the extended family clans that underlay the town’s social structure. They saw how many homes had three generations living under one roof…. – Outliers oleh Malcolm Gladwell

Sabda Nabi yang direkodkan dalam Al-Adab al-Mufrad Al-Bukhari:

49. Abu Ayyub al-Ansari told him that a bedouin came to the Prophet, may Allah bless him and grant him peace, while he was travelling. He asked, “Tell me what will bring me near to the Garden and keep me far from the Fire.” He replied, “Worship Allah and do not associate anything with Him, perform the prayer, pay zakat, and maintain ties of kinship.”

56. Anas ibn Malik reported that the Messenger of Allah, may Allah bless him and grant him peace, said, “Anyone who wants to have his provision expanded and his term of life prolonged should maintain ties of kinship.”