Shiva Purana

siva.sh/siva-purana/rudra-samhita/101/15

गजाश्चालङ्कृता ह्यासन्कृत्रिमा अकृतोपमाः ।। तथाश्वाः न सादिभिश्चैव गजाश्च गजसादिभिः ।। १५ ।।

sanskrit

Elephants with their mahouts and horses with their riders were so natural that none would say that they were artificial.

english translation

gajAzcAlaGkRtA hyAsankRtrimA akRtopamAH || tathAzvAH na sAdibhizcaiva gajAzca gajasAdibhiH || 15 ||

hk transliteration by Sanscript