At-Tawba 9:36

The number of months with Allah is twelve, in the Record of Allah[32] since the day He created the heavens and earth; of which four are sacred. This is the straight way, so do not wrong yourselves during these months[33], and fight the polytheists all together[34], just as they fight you all together. And know that Allah is with those who fear Him.

[32] i.e., the Preserved Tablet.
[33] i.e., do not violate the sacred months or commit aggression therein; they are: 1st, 7th, 11th, 12th months of the lunar calendar.
[34] See 2:193, 8:73.

Indeed, the number of months with Allāh is twelve [lunar] months in the register of Allāh [from] the day He created the heavens and the earth; of these, four are sacred.[471] That is the correct religion [i.e., way], so do not wrong yourselves during them.[472] And fight against the disbelievers collectively as they fight against you collectively. And know that Allāh is with the righteous [who fear Him].

[471] See footnote to 9:5.
[472] i.e., do not violate the sacred months or commit aggression therein.

36. Verily, the number of months with Allâh is twelve months (in a year), so was it ordained by Allâh on the Day when He created the heavens and the earth; of them four are Sacred (i.e. the 1st, the 7th, the 11th and the 12th months of the Islâmic calendar). That is the right religion, so wrong not yourselves therein, and fight against the Mushrikûn (polytheists, pagans, idolaters, disbelievers in the Oneness of Allâh) collectively[11] as they fight against you collectively. But know that Allâh is with those who are Al-Muttaqûn (the pious - See V.2:2).

[11] (V.9:36) See the footnotes of (V.2:193) and (V.8:73).

Lo! the number of the months with Allah is twelve months by Allah's ordinance in the day that He created the heavens and the earth. Four of them are sacred: that is the right religion. So wrong not yourselves in them. And wage war on all of the idolaters as they are waging war on all of you. And know that Allah is with those who keep their duty (unto Him).