What is the most complete description of how to perform ruku' (bowing) and sujud (prostration)?

The questioner : Returning means returning to fasting.

The Shaykh : Establishing the ruku'—what is meant by establishing the ruku'.

The questioner : Does "establishing" mean that his back and head are level?

The Shaykh : That his back and head are level. Second, that he places his hands on his knees with his fingers spread apart. Third, that he separates his upper arms from his sides. This is establishing the ruku'. As for sujud, one prostrates on the seven limbs and straightens his back, not extending it as some people do. In the past, when a person would prostrate, he would extend his back until he filled the space between the two rows, and he was closer to lying flat than to prostrating. This was their independent legal reasoning (ijtihad), and they will be rewarded for it, if Allah wills, but it is contrary to the Sunnah. The Sunnah is for a person to raise his back, meaning to lift it like this, as came in a hadith, which I think al-Daraqutni narrated in al-Fath al-Bari, meaning he straightens his back, separates his upper arms from his sides, raises his thighs from his lower legs, and prostrates on the seven limbs. But where does he place his hands? He places his hands opposite his shoulders in sujud. If he wishes, he can bring them forward so that they align with his forehead and nose. It is not recommended to spread them out so that they go beyond the level of his shoulders, for this is not from the Sunnah. Likewise, regarding the feet: as for the knees, it appears they should be left in their natural state, neither brought together nor spread apart, meaning he leaves them in their natural position. As for the feet, he brings them together, as came in the Sahih of Ibn Khuzaymah, and it is the apparent meaning of what 'Aishah narrated, that her hand fell on the foot of the Messenger (peace and blessings be upon him) while he was prostrating. Some scholars (may Allah have mercy on them) said that it is recommended to spread the feet apart so that there is the width of a shibr (hand's breadth) between them, but this specific measurement requires a definitive ruling from the Prophet (peace and blessings be upon him), and no such ruling has reached us from the Prophet (peace and blessings be upon him). Therefore, the correct view is that the feet should be brought together, while the knees should be left in their natural state.