This is one question Muslims keep receiving from Christians. The Noble Quran has ample Noble Verses in it that clearly say that GOD Almighty is One GOD, Who Has no son, no wife and is not divided into multiple entities. Let us look at the following Noble Verses:
“Say: He is God, the One and Only; God, the Eternal, Absolute; He begetteth not, nor is He begotten; And there is none like unto Him. (The Noble Quran, 112:1-4)”
But I would like to also respond to this question by presenting a Saying from our beloved Prophet Muhammad peace be upon him himself to respond to this question clearly from his own tongue:
Narrated ‘Umar: “I heard the Prophet saying, ‘Do not exaggerate in praising me as the Christians praised the son of Mary, for I am only a Slave. So, call me the Slave of Allah and His Apostle.‘ (Translation of Sahih Bukhari, Prophets, Volume 4, Book 55, Number 654)”
The above Noble Verses and Saying should be sufficient enough to prove that Muhammad peace be upon him is nothing but an apostle from Allah Almighty. He is in no way Allah Almighty Himself!
And God knows best..