Mishkat al-Masabih 12 Inheritance and Wills كتاب الفرائض والوصايا 28

وَعَنْ عُمَرَ رَضِيَ اللَّهُ عَنْهُ قَالَ: تَعَلَّمُوا الْفَرَائِضَ وَزَادَ ابْنُ مَسْعُودٍ: وَالطَّلَاقَ وَالْحَجَّ قَالَا: فَإِنَّهُ من دينكُمْ. رَوَاهُ الدَّارمِيّ

‘Umar said, “Learn the rules of inheritance,” Ibn Mas’ud adding, “of divorce and of the pilgrimage,” and both saying, “for it pertains to your religion.” Darimi transmitted it.