¹⁹ So hath a man deceived his neighbour, And hath said, 'Am not I playing?'

¹⁹ is the man who deceives his neighbor and says, "I am only joking!"

¹⁹ is someone who lies to a friend and then says, "I was only joking."

¹⁹ So is the man who deceives his neighbor , And says , " Was I not joking ?"