Shiva Purana
गौतमस्पर्द्धिनस्ते च ऋषयस्तत्र चागताः ॥ स्नानार्थं तांश्च सा दृष्ट्वा ह्यंतर्धानं गता द्रुतम् ॥ ७॥
The sages who were malicious towards Gautama came there to take their bath; but on seeing them Gaṅgā vanished immediately.
english translation
gautamasparddhinaste ca RSayastatra cAgatAH ॥ snAnArthaM tAMzca sA dRSTvA hyaMtardhAnaM gatA drutam ॥ 7॥
hk transliteration by Sanscript