The 4 basic Vedic texts used by Hindus are the Rig Veda, Sama Veda, Yajur Veda and Atharva Veda. The Rig Veda is organized in 10 books and is the oldest veda, it has 1,028 hymns. the Same Veda is a collection of melodies and chants, its also called "The Book of Song", it has 1,017 hymns. The Yajur Veda is a description of how religious ceremonies should be preformed, the word "Yajur" means worship and "Veda" means knowledge, it has 1,017 hymns. Atharva Veda is A collection of 20 books with chants, spells, and prayers, it has 730 hymns. 

Indulgences were slips of paper that supposedly sent you to heaven and pardoned you from the punishments of your sins. The early Roman church issued these as a reward for good people. This gave the church too much power.  Martin Luther disagreed with this because he believed that only God should decide who goes to heaven or not. 

Indulgence | Roman Catholicism | Britannica.comhttps://www.britannica.com/topic/indulgence

Hajj is the Muslim pilgrimage to Mecca that takes place in the last month of the year, and all Muslims are expected to do it at least once during their life. The word "Hajj"in Arabic means 'to intend a journey'. This is also the fifth pillar of Islam. It's mandatory for adult Muslims to go on Hajj at least once before they die.