The Will

A muslim must not sleep a night without his will being beneath his head.

رسولُ اللَّهِ صلى اللَّه عليه وآله :  الوَصِيَّةُ حَقٌّ على‏ كُلِّ مُسلمٍ . وسائل الشيعة : 13 / 352 / 6 .

 The Prophet (SAWA) said, 'The will is incumbent upon every Muslim.' Wasa'il al-Shia, v. 13, p. 352, no. 6

رسولُ اللَّهِ صلى اللَّه عليه وآله : ما يَنبَغي لامرئٍ مُسلمٍ أن يَبِيتَ لَيلَةً إلّا ووَصيَّتُهُ تَحتَ رأسِهِ . بحار الأنوار : 103 / 194 / 3 .

 The Prophet (SAWA) said, 'A muslim must not sleep a night without his will being beneath his head.' Bihar al-Anwar, v. 103, p. 194, no. 3

رسولُ اللَّهِ صلى اللَّه عليه وآله :  المَحرومُ مَن حُرِمَ الوَصيَّةَ . كنز العمّال : 46051 .

 The Prophet (SAWA) said, 'The deprived one is he who has been deprived of [the opportunity to write] a will.' Kanz al-Ummal, no. 46051