Bhagavatapurana 4.8.56

4.8.56

labdhvā dravyamayīm arcāṃ kṣity-ambv-ādiṣu vārcayet /
ābhṛtātmā muniḥ śānto yata-vāṅ mita-vanya-bhuk //

56\. Having obtained an image made of some substance as gold, silver, etc., or having the earth or water or other things of the same kind for an image he should worship the Lord having a perfect control over his mind and secured tranquillity, and control over his tongue and subsisting on simple moderate food supplied by the forest.