The Prophet ﷺ said: He who does not join the warlike expedition (jihad), or equip, or looks well after a warrior's family when he is away, will be smitten by Allah with a sudden calamity. Yazid ibn Abdu Rabbihi said in his tradition: 'before the Day of Resurrection".
عَنِ النَّبِيِّ ﷺ قَالَ مَنْ لَمْ يَغْزُ أَوْ يُجَهِّزْ غَازِيًا أَوْ يَخْلُفْ غَازِيًا فِي أَهْلِهِ بِخَيْرٍ أَصَابَهُ اللَّهُ بِقَارِعَةٍ قَالَ يَزِيدُ بْنُ عَبْدِ رَبِّهِ فِي حَدِيثِهِ قَبْلَ يَوْمِ الْقِيَامَةِ