Shiva Purana
तच्छुत्वा शम्भुवचनं विज्ञानप्रदमादरात्॥ व्रीड्यन्स्वमनसा विष्णुः प्राह वाचं महेश्वरम्॥ २१॥
On hearing those words of Śiva that imparted knowledge Viṣṇu was ashamed of himself and then he spoke to lord Śiva respectfully.
english translation
tacchutvA zambhuvacanaM vijJAnapradamAdarAt॥ vrIDyansvamanasA viSNuH prAha vAcaM mahezvaram॥ 21॥
hk transliteration by Sanscript