Facing the qiblah and the sutrah for the one praying

It is narrated from Sayyiduna Umarah bin Aws (may Allah be pleased with him) (who was blessed with performing prayers facing both qiblahs) that he said: "I was in my house when suddenly a caller called out at the door, announcing that the direction of the Prophet (peace and blessings be upon him) had been changed towards the Ka'bah. I bear witness concerning our imam and all the men, women and children that (as soon as this news reached them) they had faced this direction, meaning Bayt al-Maqdis, and then also turned towards this direction, meaning the Ka'bah."
This report is from the Musnad of Abu Ya'la. In its chain, Qays bin al-Rabi' is saduq (truthful), but he had the problem of a poor memory; however, there are supporting reports in other sahih hadith about the change of the qiblah.

It is narrated from Sayyidah Aishah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) said: "While in prayer, remain very close to the qiblah (that is, the wall or barrier (sutrah) in front of you)."
The Imam also said: Harun bin Ma'ruf narrated to us from Bishr bin al-Sari, and he narrated the like of it with his previous chain.

It is narrated from Sayyiduna Anas (may Allah be pleased with him) that he said (expressing regret over the changing conditions of his time): "I do not recognise anything among the present practices of the people and their religious and worldly affairs (in the original form of the Prophetic era (peace and blessings be upon him)), except for this one thing: that they face the direction of the qiblah (in prayer)."
Imam Abu Ya'la narrated it in his Musnad (hadith: 310). Its narrators are thiqat (trustworthy), and this narration is also mentioned in Sahih al-Bukhari (hadith: 529) with a slight difference in wording.

It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "The most honourable and virtuous of all gatherings and places of sitting is the one in which the qiblah is faced."
The chain of this narration contains a narrator named Hamzah al-Nasibi, who according to the hadith scholars is severely weak (da'if) and matruk al-hadith (abandoned in hadith); because of this, the narration is judged weak on scholarly and technical grounds.

It is narrated from Yahya bin Qamtah that he saw Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) in the Sacred Mosque (al-Masjid al-Haram), directly facing the Mizab (the waterspout of the Ka'bah), and he was saying: Allah, the Mighty and Majestic, said to His Prophet (peace and blessings be upon him): "So We will surely turn you to a qiblah with which you will be pleased" [Surah al-Baqarah: 144]. (Then, pointing towards the Ka'bah, he said:) "This is that qiblah, this is that qiblah."
Imam Ahmad bin Mani' narrated it in his Musnad, and the men of its chain are thiqat (trustworthy).

It is narrated from Ishaq bin Suwayd that Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) saw a man praying far away from the direction of the qiblah (that is, the proper place in the row), so he warned him, saying: "Step forward and stand; do not spoil your prayer to your own detriment. And I have only told you what I myself heard the Messenger of Allah (peace and blessings be upon him) say."
Imam al-Harith recorded this hadith in his Musnad (313), and all its men are thiqat (trustworthy).

Ibrahim bin Abi Mahdhurah narrates from his father, and he from his grandfather (may Allah be pleased with him), that he said: "I saw the Messenger of Allah (peace and blessings be upon him) enter the Sacred Mosque from the direction of the gate of Banu Shaybah, until he came in front of the Ka'bah. Then he (peace and blessings be upon him) faced the qiblah and drew a line across, in its width, in front of himself. Then he said 'Allahu Akbar' (Allah is the Greatest) and began the prayer, while people were passing between that line and the Ka'bah performing the tawaf."
Imam Abu Ya'la narrated this hadith; however, in its chain Husam bin Abbad is weak (da'if), and the father of Ibrahim bin Abi Mahdhurah, Abd al-Aziz bin Abd al-Malik bin Abi Mahdhurah, is a maqbul (acceptable) narrator.

It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "A woman and a dog (by passing in front of the one praying) interrupt the prayer." (The narrator says:) I asked: Then what will protect me (from the effect of their passing), that is, serve as a barrier (sutrah)? He (peace and blessings be upon him) said: "An arrow, a camel saddle, and a stone (may be used as a sutrah)."
In the chain of this narration, Dawud bin al-Muhabbar and Abu Harun al-Abdi are both weak narrators, so this narration is weak in its chain; however, the importance of the sutrah and the various things that may serve as one are mentioned in other sahih hadith.

It is narrated from a Companion (may Allah be pleased with him) of the Prophet (peace and blessings be upon him) that the Messenger of Allah (peace and blessings be upon him) said: "If there is something like the back post of a saddle between you and the one who passes in front of you, then it has indeed served as a screen and barrier for you (and your prayer has been protected)."
Imam Ahmad bin Mani' also narrated the like of it through Hajjaj, in which it is stated explicitly: "I was informed by someone who himself heard this noble saying from the blessed tongue of the Prophet (peace and blessings be upon him)."