Does the one praying begin the salam at the start of turning his head?
Machine translationRead the Arabic original
The questioner : The statement of al-Khattab, may Allah have mercy on him, is that one begins the salam at the start of the turning.
The Shaykh : This is the apparent view; the apparent view is that one begins it with the start of the turning, so that the "kaaf" of "salamun 'alaykum" is said while the turning is ending or in the middle of the turning.
The questioner : Here.
The Shaykh : Yes, not with it. As for some people who say "salamun 'alaykum" while still facing the qiblah, some jurists recommended this, but it has no basis. Some said that one does not turn until he reaches the "kaaf" of the address, but the apparent Sunnah is the opposite of that: that one turns from the moment he begins the salam.
The Shaykh : This is the apparent view; the apparent view is that one begins it with the start of the turning, so that the "kaaf" of "salamun 'alaykum" is said while the turning is ending or in the middle of the turning.
The questioner : Here.
The Shaykh : Yes, not with it. As for some people who say "salamun 'alaykum" while still facing the qiblah, some jurists recommended this, but it has no basis. Some said that one does not turn until he reaches the "kaaf" of the address, but the apparent Sunnah is the opposite of that: that one turns from the moment he begins the salam.
Source
قناة «فضيلة الشيخ محمد بن صالح العثيمين»، 1537هل يبدأ المصلي بالسلام مع بدء التفاته📔 الشرح الممتع على زاد المستقنع - ابن عثيمين — youtube.com
The Arabic text is a machine transcription of the audio recording.