Daniel 7:21
I beheld, and the same horn made war with the saints, and prevailed against them;
Cross-reference
In Daniel 8:24, a little horn also destroys the holy people, reinforcing the pattern of a persecuting ruler prevailing against God's saints.
Daniel 12:7 explicitly mentions 'scattering the power of the holy people', directly paralleling the horn's victory over the saints.
Revelation 11:7-9 shows the beast making war on the two witnesses and killing them, echoing the horn's war on the saints.
Revelation 13:7 directly states the beast 'makes war with the saints and overcomes them' — a clear allusion to Daniel 7:21.
Revelation 17:6 sees Babylon drunk with the blood of saints, showing the outcome of the horn's war — saints martyred.
Revelation 19:19 shows the same end-time battle — the beast and kings gather to war against Christ, mirroring the horn's war against saints.
Revelation 13:7 directly echoes this — the beast makes war against saints and overcomes them, the same persecution.