Indeed, the number of months with Allah is twelve [lunar] months in the register of Allah [from] the day He created the heavens and the earth; of these, four are sacred. That is the correct religion, so do not wrong yourselves during them. And fight against the disbelievers collectively as they fight against you collectively. And know that Allah is with the righteous [who fear Him].
Meaning:-
Sacred Months: i.e. the 1st, the 7th, the 11th and the 12th months of the Islamic calendar).
Righteous: (of a person or conduct) morally right or justifiable; virtuous, very good; excellent.