Incarnation of which God?

"Kaashi mathura kaaba tujhme, sab hai saibaba Tujhme". Someone witnessed Lord hanuman in him, someone saw Lord Shiva in him. Some came and said, they see their Guru nanak in him, while some said Baba is no other than Pir of Allah. Others claimed of seeing the Jesus Christ in him. Anyone who wanted to go to the Ganges, Mecca or Golden temple for their pilgrimages, found the same at Shirdi. Presence of Saibaba made the village of Shirdi, a Tirtha (Place of pilgrimage). There was no place for discrimination at Shirdi. Many people believe in Saibaba, irrespective of their religion. Our baba was such a God-incarnate. His nectar like words caused immense pleasure to the listeners. Agnihotri ji saw the supreme personality of Godhead, Lord Krishna in him while Das Ganu saw his Vithoba of Pandharpur in him. He's the god, anyone had faith in. He even revealed the Gurus of others in his own body, thus showing how he's present in all that is seen as an act of MahaMaya. He even revealed the Nirguna Swarupam Brahma (formless God), unveiling how he's the very source of creation, and beyond the curtains of Prakriti (The Universe is made of two aspects : Purusa, or the brahma, and Prakriti, or the maya; in the Dwaita concept of Sanatan Dharma). He was in all, and all in him. He is the sole reality, the Atman (Soul). In this Universe of Maya and falsehood, he incarnated to wake the people from deep sleep of unconsciousness, to end the discrimination, to make people realize the power of Maya, and help them attain self-realization. He was for his devotees. Our baba omniscient and omnipresent. One who considered baba as a Muslim, heard from him the verses from the Gita and the Scriptures. Someone who said he's a Hindu, heard the Arabic verses from the Quran and the Hadith. He was and is all pervasive. Many people still argue about the God, of which our baba was an incarnation.
                 Many people claim that Saibaba is an avatar of Lord Dattatreya (The trimurti). Lord Dattatreya is an union of three supreme (Brahma, Vishnu, Shiva). He is the god who rests upon a cow, having six arms and three faces (To symbolize the Trimurti in him; though he has a single face with attributes of all three). He holds the trident (like Shiva) in one of his middle hands. And a discus (like Vishnu) in his right upper arm. The four dogs around him, represent the four Vedas. 

Incarnations of Lord Dattatreya

Lord Dattatreya is believed to have taken these incarnations :
-> Sripad Vallabha from PithaPuram. From around 1320 AD to 1350 AD.
-> Narsimha Saraswati lived from 1378 to 1459 (Shaka 1300 to Shaka 1380). Saraswati was born into a Deshastha Brahmin family in Karanjapur.
-> Manik Prabhu, was an early 19th century Hindu saint, philosopher, poet and mystic. The Sai Baba of Shirdi is said to have met Manik Prabhu at Humanabad. The legend about Sai and Prabhu's meet narrates how Sai in his fakir's attire visited Prabhu and asked to fill his cup (lota) with money. As Prabhu's brother Tatya Saheb tried to fill it, it never could be filled. Realizing Sai's spiritual nature, Prabhu put two dried dates and flowers in it and the cup immediately filled up. Sai accepted the dates and flower and poured back more money than that could be occupied in the cup.
-> Swami Samartha of Akkalkot, MahaSamadhi 1878.
-> Sai baba of Shirdi, Maha Samadhi 15th October 1918.
-> Gajanan Maharaj of Shegaon, It is not known when he was born but his first known appearance, perhaps as a youngster in his 20s, dates to February 1878. He took Samadhi on 8 September 1910.
-> Balekundri Pant Maharaja, who took MahaSamadhi in 1905.
-> Gulwani Maharaja, who took MahaSamadhi in the year 1914. They all had the same soul working in different bodies for the uplift of mankind, to attune them to God, and give them the path of Self realization. My Humble Obeisance to all the great incarnations.
In Guru Charitra it is mentioned that Saibaba was an incarnation of the lord Dattatreya. In Sai Satcharita Chapter XXVI, the following incident helps us to know, how all pervasive Saibaba related himself to Swami Samartha (the third incarnation of Dattatreya). I would once again request the readers, to close their eyes and prostrate in front of Sadhguru Sainath maharaj, before reading this story from Sai Satcharitra.

" Satcharitra : Adhyay V

The Story of Padukas (foot-prints) under the Neem Tree :

Lord Dattatreya and akkalkot maharaj

A devotee of Akkalkot Maharaj by name Bhai Krishnaji Alibagkar worshipped the photo of Akkalkot Maharaj. He once thought of going to Akkalkot (Sholapur District), taking the darshana of the Padukas (foot-prints) of the Maharaj and offering his sincere worship there; but before he could go there, he got a vision in his dream. Akkalkot Maharaj appeared in the vision and said to him - "Now Shirdi is my resting place, go there and offer your Worship." So Bhai changed his plan and came to Shirdi, worshipped Baba, stayed there for six months and was happy. As a reminiscence of this vision etc., he prepared the Padukas and installed them on an auspicious day of Shravan, Shaka 1834 (1912 A.D.) under the Neem tree with due ceremonies and formalities, conducted by Dada Kelkar and Upasani. One Dixit Brahmin was appointed for worship, and the management was entrusted to devotee Sagun."

This incidence reveals, how baba was only akkalkot maharaj. And how Sainath maharaj is related to Mahraj Dattatreya as an Incarnate. Even many such other incidences are there.

Saibaba is the Supreme; one with all the spiritually advanced souls in all the lokas in the Universe. May he bless us all eternally.
Samasta Lokah Sukhinah Bhavantu
Hari Om tat Sat
Om Shri Sainathaye Namaha