Fasting is an Expiation (Hadith No. 1614)

Bismillah.
Volume 3, Book 31, Number 119:
Narrated Abu Wail from Hudhaifa (radiallaahu `anhu):
Umar (radiallaahu `anhu) asked the people, "Who remembers the narration of the Prophet (sallallaahu `alayhi wasallam) about the affliction?" Hudhaifa (radiallaahu `anhu) said, "I heard the Prophet (sallallaahu `alayhi wasallam) saying, 'The affliction of a person in his property, family and neighbors is expiated by his prayers, fasting, and giving in charity." 'Umar (radiallaahu `anhu) said, "I do not ask about that, but I ask about those afflictions which will spread like the waves of the sea." Hudhaifa (radiallaahu `anhu) replied, "There is a closed gate in front of those afflictions." 'Umar (radiallaahu `anhu) asked, "Will that gate be opened or broken?" He replied, "It will be broken." 'Umar (radiallaahu `anhu) said, "Then the gate will not be closed again till the Day of Resurrection." We said to Masruq, "Would you ask Hudhaifa (radiallaahu `anhu) whether 'Umar (radiallaahu `anhu) knew what that gate symbolized?" He asked him and he replied "He ('Umar (radiallaahu `anhu)) knew it as one knows that there will be night before tomorrow morning.
Talking about the first part of the Hadith, we know that one's wealth and family is a trial as Allah says:
إِنَّمَا أَمْوَالُكُمْ وَأَوْلَادُكُمْ فِتْنَةٌ
"Your wealth and your children are only a trial.." [At-Taghabun: 15]
We're tested by our wealth in the ways we earn it and spend it, and family tests us for the amount of time we spend with them and the way we spend it. Also, we're tested in our priorities - whether we put Allah before our loved ones or not..
Being human, we always falter. There are shortcomings no matter how hard we try. To make up for those, we can pray extra nawafil (voluntary prayers), keep nafil fasts and give more in charity as suggested by the Hadith above. In doing so, we'll be offering expiation for our sins and faults committed when it came to wealth and family. InshaAllah.