Al-jawab billahi at-taufeeq (the answer with Allah’s guidance)
Beginning from the Fajr of the 9th Zulhijjah up to the ‘Asr prayer of the 13th, it is obligatory on each Muslim to recite the Takbir of Tashreeq after every Fard prayer in the following words.
Allahu Akbar, Allahu Akbar,
La Ilaha Illallahu, Wallahu Akbar,
Allahu Akbar wa lillahilhamd.
(There is no god but Allah and Allah is the greatest, Allah is the greatest and to Allah belongs all praise.)
According to authentic Islamic sources, it is obligatory on each Muslim, to recite this Takbir after every Fard Salah. For women also, it is commendable though not obligatory. Whether you are performing Salah with Jama’ah (collectively) or on your own (individually) makes no difference. You must recite the Takbir. However, male Muslims should recite it in a loud voice, while females should recite it in a low voice.
(Islamic Months by ‘Mufti Taqi Uthmani’)
How many times should one recite the Takbir Tashreeq after the Fard Salah:
It is Wajib to recite the Takbir Tashreeq once only. To recite it more than one it is contrary to the Sunnah and to recite it three times and making it compulsory is Bid`ah (innovation) and sin. (Ahsanul Fataawa Vol. 4 Pg. 152)
And Only Allah Ta’ala Knows Best.
Moulana Qamruz Zaman