All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
In regard to the first question, some Ahaadeeth that imply this meaning were reported, among which is what Al-Bayhaqi reported in "Shu’ab Al-Eemaan" that Abu Sa’eed Al-Khudri narrated: “The Prophet passed by a funeral procession near a grave and he asked: ''Whose grave is this?” They (the companions) replied: “It is the grave of so and so from Abyssinia (Ethiopia). Thereupon, the Prophet said: “Laa Ilaaha Illa Allaah [None has the right to be worshipped but Allaah] he was driven from Allaah’s earth and heaven to his soil from which he was created.” [Al-Albaani classified this Hadeeth as Hasan in "As-Silsilah As-Saheehah"]
Also, ‘Abdur-Razzaaq reported in his “Al-Musnnaf” that Ibn ‘Abbaas, may Allaah be pleased him, said: “Every person will be buried in the soil from which he was created.” This statement from Ibn ‘Abbaas has the ruling of Marfoo’ (i.e. the statements attributed to the Prophet ) because such matters cannot be spoken of on the basis of personal opinion.
As regards your second question, you may find the answer in Fatwa 86254.
With regard to the third question, then we did not find it in any statement attributed to the Prophet but some interpreters of the Quran mentioned it, like Ismaa’eel Haqqi, from the Hanafi School of jurisprudence, in his Tafseer “Rooh Al-Bayaan” from Wahb Ibn Munabbih, who is well-known of transmitting Israa’iliyyaat (Judeo-Christian traditions).
Allaah Knows best.