Ibn Arabi [1]

Mim is actually Adam and Muhammad, peace be upon both, and the Ya (y letter in Arabic, sounding as eee) between them is the cause for their mutual linkage, because of the placement of Harf (Divine Alphabet) Illat (Same as Madd prolonged letter usually eeee or oooo or aaaa sound). (Jalal: M sound can be prolonged either through nasalization or addition of stretched eeee between the two ‘M’ sounds i.e. Meeee….eeeeM) This prolonged letter or phoneme allowed Muhammad to act upon Adam (from a distance in time and place and across universes, free of causality) a Spiritual Action, as said by the Prophet: I was a Nabi (Informer) while Adam was still between the water and mud. Conversely Adam acted upon Muhammad a corporeal action (causal action), again by mediation of the agency of Ya (y letter in Arabic, sounding as eee) (i.e. through the genomic and biological processes on this planet.)

Q: Did Ibn Arabi made this up or there was some evidence for it?
A: The Prophet said [2]: When Allah created Adam made him see the virtues of some of his off-springs (and while he was browsing) he saw a radiant light all the way from the back so he asked: O my Lord who is that? And Allah replied: That is your son Admad, he is the Al-Awwal (The first) and he is Al-Akhir (The Last)

Jalal: Until less than 100 years ago we had no idea how human beings are linked to each other, now through the molecular science of Genome we all know and very well know how people are linked in past and in future. Mim is the prolonged phoneme/letter that links the first and the last Prophet, both spiritually and genomically, Muhammad was a Nabi (Informer) informing through the radiation of Nur-Muhammadi, a peculiar form of Nur (Divine Light), from extremely close sanctified nearness which in this Surah we hear as Sabbihi. In return Adam acts upon Muhammad in a molecular causal fashion i.e. via his genome and thus the two form a close loop or a circle.

[1] Ibn Arabi, Kitab Al-Mim, from compendium of letters.

[2] Muttaqi Al-Hindi, Kanz Al-‘Ummāl, Vol 11.