The Prophet ﷺ said: It is not allowable for a Muslim to keep apart from his brother for more than three days, for one who does so and dies will enter Hell.
قَالَ رَسُولُ اللَّهِ ﷺ لاَ يَحِلُّ لِمُسْلِمٍ أَنْ يَهْجُرَ أَخَاهُ فَوْقَ ثَلاَثٍ فَمَنْ هَجَرَ فَوْقَ ثَلاَثٍ فَمَاتَ دَخَلَ النَّارَ