Question 4: I hear some people reciting Takbeer (saying: “Allaahu Akbar [Allaah is the Greatest]”) after each Salaah (Prayer) during the Days of Tashreeq (11th, 12th and 13th of Thul-Hijjah) until the ‘Asr (Afternoon) Prayer of the third day. Is this correct or not?
Answer: It is prescribed to recite an unrestricted [in terms of time. Ed] or a restricted Takbeer during ‘Eed Al-Ad-haa (the Festival of the Sacrifice). The unrestricted Takbeer can be recited at any time from the beginning of Thul-Hijjah until the last Day of Tashreeq. The restricted Takbeer should be recited after the Obligatory Daily Prayers starting from the Fajr (Dawn) Prayer of the Day of `Arafah until the ‘Asr Prayer on the last Day of Tashreeq. The evidence for the permissibility of doing this is the Ijmaa‘ (consensus of scholars) and the practice of the Sahaabah (Companions of the Prophet, may Allaah be pleased with them)… read more here.