The Greatest Obligatory Act
عَنْ أَمِيرِ الْمُۆْمِنِينَ )ع) أَنَّهُ قَالَ: بِرُّ الْوَالِدَيْنِ أَكْبَرُ فَرِيضَـةٍ
The Commander of the Faithful (peace be upon him) has said: “Goodness towards (one’s) parents
is the greatest obligatory act.”
Source: Mizanul Hikmah, Volume 10, Page 709
Other links:
The Condition of a Hospitable Believer on the Day of Judgement