Text this: The Concepts of Sakinah, Mawaddah and Rahmah as Foundation for Marital Happiness According to the Holy Qurʾan: An Analysis Based on Ayat 21, Surah al-Rum = Konsep Sakinah, Mawaddah dan Rahmah Sebagai Asas Kebahagiaan Rumahtangga Menurut al-Qurʾan: Suatu Analisis Berdasarkan Ayat 21, Surah al-Rum)