וְנָֽתַתִּי֙ מֽוֹפְתִ֔ים בַּשָּׁמַ֖יִם וּבָאָ֑רֶץ דָּ֣ם וָאֵ֔שׁ וְתִֽימֲר֖וֹת עָשָֽׁן׃
Aku akan mengadakan tanda-tanda di langit dan di bumi: darah, api, dan tiang-tiang asap.
Mishneh Torah, Leavened and Unleavened Bread
"And with wonders" - this [refers to] the blood, as it is stated (Joel 3:3); "And I will place my wonders in the skies and in the earth; blood and fire and pillars of smoke."