The story of the birth of Lord Hanuman goes thus:
Vrihaspati had an attendant called Punjikasthala, who was cursed to assume the form of a female monkey – a curse that could only be nullified if she would give birth to an incarnation of Lord Shiva
. Reborn as Anjana, she performed intense austerities to please Shiva, who finally granted her the boon that would cure her of the curse.
Story behind the birth of Lord Hanuman?
When Agni, the god of fire, gave Dasharath, the king of Ayodhya (Now in Uttar Pradesh, India), a bowl of sacred dessert to share among his wives so they may have divine children, an eagle snatched a part of the pudding and dropped it where Anjana was meditating, and Pavana, the god of wind delivered the drop to her outstretched hands. After she took the divine dessert, she gave birth to Hanuman. Thus Lord Shiva incarnated as a monkey, and was born as Hanuman to Anjana, by the blessings of Pavana, who thus became Hanuman’s godfather.
The Hanuman Chalisa (Devanagari: हनुमान चालीसा; literally Forty chaupais on Hanuman) is a Hindu devotional hymn (stotra) addressed to Hanuman. It is traditionally believed to have been authored by 16th-century poet Tulsidas in the Awadhi language, and is his best known text apart from the Ramcharitmanas. The word “chālīsā” is derived from “chālīs”, which means the number forty in Hindi, as the Hanuman Chalisa has 40 verses (excluding the couplets at the beginning and at the end).