Al-Imām ibn al-Qayyim رحمه الله said:
FOUR which bring about sustenance
1. Night Prayers
2. Seeking Allāh’s ﷻ forgiveness at dawn.
3. Sadaqah (optional charity).
4. Remembrance of Allāh’s ﷻ during the morning & evening.
Zaad ul-Ma’aad, Vol. 4 P.378