John 16:20-22
Truly, truly, I tell you, you will cry and mourn [i.e., over my suffering and death], but the world will be glad [about it]. You will be sad, but your sadness will turn to joy [i.e., when learning of my resurrection].
Romans 15:9-12
and so that the Gentiles [also] may honor God for His mercy, as it is written [Psa. 18:49], "Therefore, I will praise you among the Gentiles and sing to your name." [Note: Paul here accommodates the words of King David by applying them to Jews participating with Gentiles in praising God as part of the one body].
Revelation 11:3-15
And I will give [authority] to my two witnesses and they will prophesy for 1,260 days, wearing sackcloth" [i.e., a black, coarse cloth made of goat's hair].