Other references where a Jew uses the phrase My God'....
Originally Posted by Sojourning
Stir up thyself, and awake to my judgment, even unto my cause, my God and my Lord.
The Lord is my strength and song, and he is become my salvation: he is my God, and I will prepare him an habitation; my father's God, and I will exalt him.
Behold, I have taught you statutes and judgments, even as the Lord my God commanded me, that ye should do so in the land whither ye go to possess it.
Art thou not from everlasting, O Lord my God, mine Holy One? we shall not die. O Lord, thou hast ordained them for judgment; and, O mighty God, thou hast established them for correction.
Nevertheless my brethren that went up with me made the heart of the people melt: but I wholly followed the Lord my God.
1 Kings 3:7
And now, O Lord my God, thou hast made thy servant king instead of David my father: and I am but a little child: I know not how to go out or come in.
Hearken unto the voice of my cry, my King, and my God: for unto thee will I pray.
My God, my God, why hast thou forsaken me? why art thou so far from helping me, and from the words of my roaring?
Jesus saith unto her, Touch me not; for I am not yet ascended to my Father: but go to my brethren, and say unto them, I ascend unto my Father, and your Father; and to my God, and your God.
First, I thank my God through Jesus Christ for you all, that your faith is spoken of throughout the whole world.
Here is a reference where one is calling someone other than 'God' my god. It's a direct reference to idolatry...
And the residue thereof he maketh a god, even his graven image: he falleth down unto it, and worshippeth it, and prayeth unto it, and saith, Deliver me; for thou art my god.
136 verses in the KJV contain the phrase 'my God' every one of them refers to God.
Only 1 verse contains the phrase 'my god', and it refers to the idolatry of the one saying it.
Thomas calling Jesus My Lord and My God would be the only instance in the entire bible some one other than God was called My God.
As it actually is, Thomas calling Jesus his Lord and his God falls within the context of the book of John, where Jesus is revealed to be the Word who was with God and was God. Where it said to Thomas and Philip that in knowing and seeing Jesus, they know and have seen God, and from that point were to know authoritatively that indeed they did know and have seen God.
This information floating around in the head of doubting Thomas was fully realized in Thomas' exclamation...My Lord and My God. Thomas saying this to any lesser god would have been blasphemous.
And the Lord said unto Gideon, By the three hundred men that lapped will I save you.