Maryam 19:26

Fakulee washrabee waqarree AAaynanfa-imma tarayinna mina albashari ahadan faqooleeinnee nathartu lirrahmani sawmanfalan okallima alyawma insiyya

So eat and drink and be contented. And if you see from among humanity anyone, say, 'Indeed, I have vowed to the Most Merciful abstention, so I will not speak today to [any] man.'"

So eat, drink and cool your eyes. Then if you see any human being, say (to him), “I have vowed a fast (of silence) for the All-Merciful (Allah,) and therefore, I shall never speak to any human today.”