Bhagavad Gita · 17.3

सत्त्वानुरूपा सर्वस्य श्रद्धा भवति भारत।श्रद्धामयोऽयं पुरुषो यो यच्छ्रद्धः स एव सः॥

sattvānurūpā sarvasya śhraddhā bhavati bhārata śhraddhāmayo 'yaṁ puruṣho yo yach-chhraddhaḥ sa eva saḥ

The faith of each person is in accordance with their nature, O Bharata. A person is made of their faith — whatever their faith is, that indeed they are.

— Bhagavad Gita 17.3

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)