The Cow - 2:197
Hajj should be performed in the known months. Whoever has decided to perform Hajj in those months, know that in Hajj there is no sexual intercourse, no evil deeds, and no arguing. Allah knows every good deed you do. When you prepare your provisions for the journey, remember that the best provision is virtue. People of understanding! Listen to me.
Months of Hajj?
The Repentance/9:36
The number of months in Allah´s Book on the day He created the heavens and the earth is twelve according to Allah. Four of them are sacred. This is the perfect religion; do not wrong yourselves in those months (by fighting). But if the idolaters fight you in a total war, then fight them in a total war. Know that Allah is with the righteous.
The Cow/2:189
They ask you about the phases of the moon. Say that it is a measure of time for mankind and for the pilgrimage. Goodness is not beating around the bush, goodness is abstinence. Be honest. Listen to Allah for your salvation.