2 verses have
unjustly
in Edition Clear Qur'an by Talal Itani / Aal-i-Imraan (The Family of Imraan)

3:21As for those who defy God’s revelations, and kill the prophets unjustly, and kill those who advocate justice among the people—promise them a painful retribution.

3:112They shall be humiliated wherever they are encountered, except through a rope from God, and a rope from the people; and they incurred wrath from God, and were stricken with misery. That is because they rejected God’s revelations, and killed the prophets unjustly. That is because they rebelled and committed aggression.