CC Antya 18.34

mano-vege gelā prabhu, dekhite nārilā
prabhure nā dekhiyā saṁśaya karite lāgilā
Word for word: 
manaḥ-vege — at the speed of mind; gelā — went; prabhu — Śrī Caitanya Mahāprabhu; dekhite nārilā — no one could see; prabhure — the Lord; dekhiyā — not seeing; saṁśaya — doubts; karite lāgilā — began to feel.
Translation: 
Śrī Caitanya Mahāprabhu had run off at the speed of the mind. No one could see Him. Thus everyone was puzzled as to His whereabouts.