Shiva Purana
औदुंबरस्य शाखायास्तत्प्रवाहो विनिस्सृतः ॥ तत्र स्नानं मुदा चक्रे गौतमो विश्रुतो मुनिः ॥ ४॥
Its current flowed from the branches of an Udumbara tree. Gautama, the famous sage, took his bath joyously.
english translation
auduMbarasya zAkhAyAstatpravAho vinissRtaH ॥ tatra snAnaM mudA cakre gautamo vizruto muniH ॥ 4॥
hk transliteration by Sanscript