Is grahast jivan mentioned somewhere in scriptures
Yes, gṛhastha-jīvan (householder life) is clearly mentioned and guided in Jain scriptures.
In Jain terminology, a Jain living gṛhastha-jīvan is called a śrāvaka (male) and śrāvikā (female). Their life, duties and vows are described in detail in many śāstras:
- Ratnakaraṇḍa Śrāvakācāra (Digambar)
- Classic text by Āchārya Samantabhadra. - Explains how a householder should live: 12 vows (bārah vrata), daily conduct, dāna, samayik, saiyam, etc.
- Upāsaka Daśāṅga (Upāsaka-daśāḥ) (Śvetāmbara, part of Āgamas)
- Describes ideal lay followers of Bhagwān Mahāvīr and how they lived as householders with high dharmic standards.
- Śrāvakaprajñapti, Jīta-kalpa, etc. (Śvetāmbara)
- Contain rules and examples for śrāvakas/śrāvikās.
- Other Digambar Śrāvakācāra texts
- e.g. by Āchārya Amitgati, Āchārya Jinasena, etc., all dealing with gṛhastha dharma.
Main idea in all:
- Gṛhastha-jīvan is fully accepted in Jain Dharma.
- But it must be lived with:
Both Digambar and Śvetāmbara agree on:
- Householder life is a valid stage on the path to mokṣa.
- Separate, detailed śrāvaka-dharma is given for gṛhasthas; only wording and some practices differ between traditions.
For more on śrāvaka (gṛhastha) duties you can read here and here