CC Ādi 17.101

āra dina eka bhikṣuka āilā māgite
prabhura nṛtya dekhi nṛtya lāgila karite
Word for word: 
āra — another; dina — day; eka — one; bhikṣuka — beggar; āilā — came; māgite — to beg; prabhura — of the Lord; nṛtya — dancing; dekhi — seeing; nṛtya — dancing; lāgila — began; karite — to perform.
Translation: 
On another day a mendicant came to beg alms from the Lord’s house, but when he saw the Lord dancing, he also began to dance.