John 16:20

Jesus knew they were dying to ask him what he meant, so he said, “Are you trying to figure out among yourselves what I meant when I said, ‘In a day or so you’re not going to see me, but then in another day or so you will see me’? Then fix this firmly in your minds: You’re going to be in deep mourning while the godless world throws a party. You’ll be sad, very sad, but your sadness will develop into gladness.

John 16:19-20