Does the takbir of entering prayer suffice for the takbir of bowing?
Machine translationRead the Arabic original
The questioner : The correct view is that the takbir of bowing suffices here, because they are two acts of worship that coincide at the same time, so one of them is sufficient, namely the pillar.
The Shaykh : This is the correct view, but if he is able to say the takbir for bowing, that is better.
The questioner : But it is necessary that in every state, it is better.
The Shaykh : A state of being stabbed, yes.
The questioner : If he says it while he is...
The Shaykh : And he is bowing down, it does not suffice for the takbir of entering prayer.
The Shaykh : This is the correct view, but if he is able to say the takbir for bowing, that is better.
The questioner : But it is necessary that in every state, it is better.
The Shaykh : A state of being stabbed, yes.
The questioner : If he says it while he is...
The Shaykh : And he is bowing down, it does not suffice for the takbir of entering prayer.
Source
قناة «فضيلة الشيخ محمد بن صالح العثيمين»، 200 - هل تجزئ تكبيرة الإحرام عن تكبيرة الركوع؟ قواعد ابن رجب - ابن عثيمين — youtube.com
The Arabic text is a machine transcription of the audio recording.