Revelation 14:9-11

They were followed by another, a third angel, crying aloud, "Whoever worships the Beast and his statue, and lets his forehead or hand be marked,

Revelation 18:4-5

And I heard another voice from heaven crying, "Come out of her, O my people, that you share not her sins, that you partake not of her plagues:

Treasury of Scripture Knowledge

Summary

Their sorrows shall be multiplied that hasten after another god: their drink offerings of blood will I not offer, nor take up their names into my lips.

Bible References

Their

Revelation 14:9
They were followed by another, a third angel, crying aloud, "Whoever worships the Beast and his statue, and lets his forehead or hand be marked,
Revelation 18:4
And I heard another voice from heaven crying, "Come out of her, O my people, that you share not her sins, that you partake not of her plagues: