Exodus 1:14

1:14 They made their lives bitter by hard service with mortar and bricks and by all kinds of service in the fields. Every kind of service the Israelites were required to give was rigorous.

Numbers 9:11

9:11 They may observe it on the fourteenth day of the second month at twilight; they are to eat it with bread made without yeast and with bitter herbs.

Zechariah 12:10

12:10 “I will pour out on the kingship of David and the population of Jerusalem a spirit of grace and supplication so that they will look to me, the one they have pierced. They will lament for him as one laments for an only son, and there will be a bitter cry for him like the bitter cry for a firstborn.

Zechariah 12:1

The Repentance of Judah

12:1 The revelation of the word of the Lord concerning Israel: The Lord – he who stretches out the heavens and lays the foundations of the earth, who forms the human spirit within a person – says,

Zechariah 1:6

1:6 But have my words and statutes, which I commanded my servants the prophets, not outlived your fathers? Then they paid attention and confessed, ‘The Lord who rules over all has indeed done what he said he would do to us, because of our sinful ways.’”