Regardless of denomination: According to the canonical gospels of Matthew, Mark and Luke, Jesus spent 40 days fasting in the desert — where he endured temptation by satan. Ash Wednesday marks the beginning of this 40-day liturgical period of prayer and fasting.
Ash Wednesdays
Challenges and Ashes
Parable of the Faithful Servant
“To whomever much is given, of him will much be required;
and to whom much was entrusted, of him more will be asked.”
In memory of a shield and a cross: Daniel 12:2
And many of them that sleep in the dust of the earth shall awake, some to everlasting life, and some to shame and everlasting contempt.
The Resurrection of the Dead
1. And in those days shall the earth also give back that which has been entrusted to it,
And Sheol also shall give back that which it has received,
And hell shall give back that which it owes.
Awakenings 
[…] In Memory (and Honor): Ash Wednesday […]
LI. The Resurrection of the Dead, and the Separation by the Judge of the Righteous and the Wicked.
CHAPTER LI.
1. And in those days shall the earth also give back that which has been entrusted to it,
And Sheol also shall give back that which it has received,
And hell shall give back that which it owes.
5a. For in those days the Elect One shall arise,
2. And he shall choose the righteous and holy from among them:
For the day has drawn nigh that they should be saved.
3. And the Elect One shall in those days sit on My throne,
And his mouth shall pour forth all the secrets of wisdom and counsel:
For the Lord of Spirits hath given (them) to him and hath glorified him.
4. And in those days shall the mountains leap like rams,
And the hills also shall skip like lambs satisfied with milk,
And the faces of ⌈all⌉ the angels in heaven shall be lighted up with joy.
5b. And the earth shall rejoice,
c. And the righteous shall dwell upon it,
d. And the elect shall walk thereon.
The Book of Enoch
http://www.sacred-texts.com/bib/boe/index.htm