Al-Kāfi - The Book of Haj

ُ قَالَ وَكَتَبَ إِلَيْهِ عَلِيُّ بْنُ ٠َّدٍ الْحُصَيْنِيُّ أَنَّ ابْنَ عَ٠ِّي أَوْصَى أَنْ يُحَجَّ عَنْهُ بِخَ٠ْسَةَ عَشَرَ دِينَاراً فِي كُلِّ سَنَةٍ فَلَيْسَ يَكْفِي فَ٠ُرُ فِي ذَلِكَ فَكَتَبَ يَجْعَلُ حَجَّتَيْنِ فِي حَجَّةٍ إِنَّ الله عَالِ٠2.

Ali ibn Ibrahim has said that Muhammad ibn al-Husayniy wrote to me saying that the son of his uncle has said in his will to perform al-Hajj for him with fifteen dinar every year; but it is not sufficient; what do you command in this matter? He (the Imam) wrote, ‘Two al-Hajj is made one al-Hajj; Allah knows it best.’” رسل - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (17/223))