Mahabharat
असृजंस्ते महासत्त्वा जृम्भिकां वृत्रनाशिनीम् । विजृम्भमाणस्य ततो वृत्रस्यास्थादपावृतात् ॥ ५-९-५३ ॥
Those greatly spirited ones created a Jrimbhika (yawn) that would be Vritra’s destruction. When Vritra yawned and his mouth opened -
english translation
asRjaMste mahAsattvA jRmbhikAM vRtranAzinIm । vijRmbhamANasya tato vRtrasyAsthAdapAvRtAt ॥ 5-9-53 ॥
hk transliteration by Sanscript