At-Tawbah · 9:37

37. Postponing the sacredness of the month of Muḥarram to another month, as the Arabs of the time of ignorance before Islam used to do, was another example of their disbelief and rejection of His laws. Satan led the disbelievers further astray through this, when he made them adopt this evil practice. They would declare a sacred month not to be sacred one year, exchanging it for one of the other months, and honoured its sacredness another year, making up the same number of months that Allah made sacred, but changing which months, in opposition to Allah’s law. Satan made their evil actions seems attractive to them so that they did them, and one such action was postponing sacred months through their invention. Allah does not give success to the disbelievers and those who persist in disbelief.