CC Ādi 14.45

kabhu mṛdu-haste kaila mātāke tāḍana
mātāke mūrcchitā dekhi’ karaye krandana
Word for word: 
kabhu — sometimes; mṛdu-haste — by His soft hand; kaila — did; mātāke — His mother; tāḍana — chastise; mātāke — His mother; mūrcchitā — fainted; dekhi’ — seeing; karaye — was; krandana — crying.
Translation: 
Once the child, Caitanya Mahāprabhu, chastised His mother with His soft hand, and His mother pretended to faint. Seeing this, the Lord began to cry.