Five
x Five Crucial Buddhist Core Categories:

There are five Mental
Abilities:
1:
Faith,
2: Energy,
3: Awareness,
4: Concentration and 5:
Understanding.

There are five Rules of
Training:
1:
No Killing,
2: No Stealing,
3: No Lying,
4:
No Sexual Abuse,
5; No Alcohol or Drugs.

There are five
Clusters of Clinging
to:
1:
Form, 2: Feeling, 3: Perception, 4: Construction, 5: Consciousness.

There are five
Mental Hindrances:
1:
Sense-Desire,
2: Anger,
3: Lethargy and Laziness,
4:
Regret and Restlessness,
5: Doubt and Uncertainty.

There are five
Destinations right after
Death:
1: Hell, 2: Animal,
3: Hungry Ghost, 4: Human Being, 5: Deity.

More on these core
concepts enabling comprehension:
https://What-Buddha-Said.net/drops/III/Five_Abilities_Summary.htm
https://What-Buddha-Said.net/sangha/Refuges_and_Precepts.htm
https://What-Buddha-Said.net/drops/II/The_5_Clusters_of_Clinging.htm
https://What-Buddha-Said.net/drops/II/The_5_Mental_Hindrances.htm
https://What-Buddha-Said.net/drops/IV/Five_Destinations.htm

Source: The Exhaustive Speeches by the
Buddha. Digha Nikāya 33
http://www.pariyatti.com/book.cgi?prod_id=25103
https://What-Buddha-Said.net/library/ati_website/html/tipitaka/dn/index.html
