The Mosque is a place of worship, spontaneous and ceaseless praise, and a place where people gather to remember the Divine. Its significance not only limited to remembrance, but in the fact that the remembrace is done in a gathering. It also enable welfare of the community, gives an opportunity to care for others and to love one another. Mosque becomes a powerful and practical implementation of "love thy neighbors" commandment. In the time of the Prophet, mosque was the central place of social welfare, activism and care giving to those who were in need.
A mosque facilitates and promotes worship of One God and therefore fosters a personal bond of love and devotion between man and his God. A mosque is essentially a first step towards fostering unity and brotherhood amongst people and consequently, a powerful force in our endeavors to unite mankind.
The original arabic word, Masjid meaning any place where you do 'sajda' (prostration) before God Almighty. In Sajda or prostration the forehead touching the ground as practiced in Salat or prayer.
Prophet Muhammad said: When a person leave his earthly body, all his or her actions terminate but three:
1. Knowledge through which people benefit,
2. Sadaqa Jaariyya (recurring charity), and
3. Pious child who makes dua or supplication for the parents.
And building of Mosque falls into the Sadaqa Jaariyya or recurring / continuous charity because as long as people come for Divine Remembrance and worship, the merits and blessings are sent to the ones who were behind building the mosque.
Sadaqa and Charity in the Qur'an
The importance of charity is mentioned many times in the Qur'an. One such verse is: "Give to the near of kin his due, and also to the needy and the wayfarers. Do not squander your wealth wastefully; for those who squander wastefully are Satan's brothers, and Satan is ever ungrateful to his Lord." (17:26-27)
Rewards for Giving Charity
Giving sadaqa will not diminish a Muslim's wealth. It serves as expiation for sins and yields rewards in the next life.
Allah says: "For those who give in charity, men and women, and loan to Allah a Beautiful Loan, it shall be increased manifold (to their credit), and they shall have (besides) a liberal reward."(Qur'an 57:18).
And, the Prophet Muhammad (peace be upon him) said: "To give something to a poor man brings one reward, while giving the same to a needy relation brings two: one for charity and the other for respecting the family ties." (Ahmad and Tirmidhi)