What is the ruling on takbir during the ten days and the days of Tashriq?

The questioner : May Allah reward the Honorable Shaykh with every good. We present these questions, and although there are many of them, one question asks: Honorable Shaykh, is the takbir in these days restricted or unrestricted? Does it take precedence over the prescribed dhikr? We ask for a detailed explanation. Is there evidence regarding the difference between them? And what is its time, in terms of beginning and ending?

The Shaykh : The scholars (may Allah have mercy on them) spoke at length about this issue regarding the restricted and the unrestricted, but there is nothing narrated from the Prophet (peace and blessings be upon him) on this matter. The well-known position in the madhhab of Imam Ahmad (may Allah have mercy on him) is that the unrestricted takbir is that which is done at any time from the entry of the month of Dhul-Hijjah until the prayer of the day of Eid.
As for the restricted takbir, it is from the Fajr prayer on the Day of 'Arafah until the 'Asr prayer on the last day of the days of Tashriq. Accordingly, the thirteen days are divided into three sections regarding takbir: a section containing only unrestricted takbir, a section containing only restricted takbir, and a section containing both unrestricted and restricted takbir. The section containing only unrestricted takbir is from the entry of the month of Dhul-Hijjah until the Fajr of the Day of 'Arafah; this is unrestricted. The meaning of unrestricted is that it is not prescribed after the prayers, but the dhikr of the prayer takes precedence over it. The second section, the restricted one containing no unrestricted takbir, is from the Dhuhr prayer on the Day of Sacrifice until the 'Asr prayer on the last day of the days of Tashriq. In these four days, there is restricted takbir, meaning it is done after the prayer and not in the remaining times. The third section combines the unrestricted and the restricted. From when to when? From the Fajr prayer on the Day of 'Arafah until the Eid prayer, which is approximately twenty-four hours. However, the correct view is that the unrestricted takbir is from the sighting of the crescent of the month of Dhul-Hijjah until the setting of the sun on the last day of the days of Tashriq. All thirteen days contain unrestricted takbir. But from the Day of 'Arafah to the last of the days of Tashriq, there is also restricted takbir, recited after the prayer along with the dhikr of the prayer.
The Shaykh: This matter is broad in scope. That is to say, if a person does not say the specific takbir and is content with the dhikr of the prayers, that is sufficient. And if he says the takbir even on the general days after the prayers, that is permissible. The matter is broad in this regard because Allah the Exalted said regarding the ends of the prayers: on their sides, and He said: on what He has provided them of livestock, in known days, and He the Exalted said: except for one who fears Allah. All of these are dhikr, and the matter is broad in this. What is important is that we fill the times of these ten days and the days of Tashriq with dhikr. Yes.