Narrated Mu'adh bin Jabal (RA):

The Prophet (ﷺ) said: "Allah gave (a favor) as Sadaqah to you a third of your property, when you are about to die, as an increase in your good deeds." [Reported by ad-Daraqutni].

وَعَنْ مُعَاذِ بْنِ جَبَلٍ ‏- رضى الله عنه ‏- قَالَ : " قَالَ اَلنَّبِيُّ [1]‏ ‏- صلى الله عليه وسلم ‏-{ إِنَّ اَللَّهَ تَصَدَّقَ عَلَيْكُمْ بِثُلُثِ أَمْوَالِكُمْ عِنْدَ وَفَاتِكُمْ ; زِيَادَةً فِي حَسَنَاتِكُمْ } رَوَاهُ اَلدَّارَقُطْنِيُّ [2]‏ .‏