Assalamu alaikum wa rahmatullahi wa barakatuhu!
In the Name of Allah, Most Gracious, Most Merciful
It is wajib (necessary) to recite the Takbeer Tashriq after every Fardh salah from the Fajr of the 9th Dhul Hijjah to the Asr of the 13th Dhul Hijjah. Men should recite loudly and women should recite softly.
Wasalaam!
