Shayk Abdullah al-Bukhari: “Takbirs in the prayer are to be done as one moves from one position to the next.”
[Taken from the lessons on “Conditions, Pillars and Obligation of Salah – Shaykh ul Islaam Muhammad bin Abdil Wahhab رحمه الله Explanation by Shaykh Abdul Muhsin al abbaad حفظه الله Taught by: Abdulilah Lahmami]