In Jainism, the concept of "fal pooja" (fruit worship) is not a central ritual as per the core Jain scriptures (Agamas or canonical texts). Jain worship (pooja) is mainly focused on the veneration of the Tirthankaras and their qualities, not on the offering of material things with the expectation of worldly fruits or rewards.

However, the practice of offering fruits and other items during pooja in Jain temples is a later development, more aligned with ritualistic traditions that evolved over time and were influenced by local customs and cultures. The main purpose of Jain pooja is to express devotion (bhakti) and to remind the devotee of the virtues of the Tirthankaras, rather than to seek material benefits.

Scriptural Perspective:

• Jain Agamas do describe the ritual of Ashta-Prakari Pooja (eightfold worship), which includes offerings like water (jal), sandalwood (chandan), rice (akshat), flowers (pushpa), incense (dhup), lamp (deep), fruit (fal), and sweets (naivedya). However, the offering of fruit is symbolic.
• The fruits (fal) offered during pooja represent the desire for "phala" or the ultimate result—liberation (moksha)—rather than any material gain.
• Jain acharyas explain that the true fruit of worship is the purification of the soul, not physical or material rewards.

Story or Allegory: While there is no specific story in Jain scriptures that narrates the origins or importance of "fal pooja," Jain texts and commentaries sometimes use allegories. For example:

A devotee once asked a Jain monk why fruits are offered during pooja if Jainism teaches detachment from worldly things. The monk explained that the offering is symbolic: just as a fruit is the result of a tree's growth, spiritual progress bears the "fruit" of liberation. The devotee is reminded to aspire for the highest fruit—the shedding of karmas and attainment of moksha.

Summary:

• "Fal pooja" in Jainism is symbolic, not meant for material gain.
• There is no specific story of fal pooja in canonical Jain scriptures.
• The offering of fruit during pooja represents the devotee’s wish for the spiritual fruit of liberation.

If you would like references from Jain texts or want to know more about Ashta-Prakari Pooja, please let me know!