Charak Samhita
सञ्जृम्भन् सङ्क्षिपंश्चैव तथाऽङ्गानि प्रसारयन् । पार्श्वे चोभे समायम्य कूजन् स्तम्भरुगर्दितः ॥२८॥
He yawns, contracts and expands his body, and while respiring he contracts both the flanks making murmuring sounds, and suffers from stiffness and pain.
english translation
saJjRmbhan saGkSipaMzcaiva tathA'GgAni prasArayan । pArzve cobhe samAyamya kUjan stambharugarditaH ॥28॥
hk transliteration by Sanscript