The etiquette of entering the Ka'bah

It is narrated from Sayyidah Aishah (may Allah be pleased with her) that she used to say: "How strange is the Muslim man who, when he enters the Ka'bah, raises his gaze toward the ceiling, whereas he should refrain from that out of reverence and veneration for Allah. When the Messenger of Allah (peace and blessings be upon him) entered the Ka'bah, his gaze did not go beyond the place of his prostration until he came out of it."
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it!

It is narrated from Sayyidah Aishah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) left me in a very happy and contented state, then when he came back he was sad. I said: "O Messenger of Allah! When you left here, you were in such a (pleasant) state?" He (peace and blessings be upon him) said: "I entered inside the Ka'bah, but now I wish I had not done so, for I fear that I may have put my Ummah into hardship after me."
This hadith has a sahih (authentic) chain of narration, but the two Shaykhs did not record it.

Ibn Jurayj said: I asked Ata: "Did you hear Ibn Abbas say: You were only commanded to perform tawaf, and you were not commanded to enter it?" He said: "He did not forbid us from entering it, but I heard Sayyiduna Ibn Abbas (may Allah be pleased with them both) say that Sayyiduna Usamah bin Zayd (may Allah be pleased with him) told him that the Prophet (peace and blessings be upon him) entered the House of Allah, and when he came out, he prayed two rak'ahs facing the House of Allah and said: This is the qiblah."
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it in this way!