The Gospel denies the belief in trinity. Gospel passages that tell the oneness of Allah and not to ascribe any equals to Him

One of the teachers of the law came and heard them debating. Noticing that Jesus had given them a good answer, he asked him, "Of all the commandments, which is the most important?" "The most important one," answered Jesus, "is this: 'Hear, O Israel, the Lord our God, the Lord is One." "Well said, teacher," the man replied. "You are right in saying that God is One and there is no other but Him." (Mark, 12:28-32)

... But God is One. (Galatians, 3:20)

There are different kinds of working, but the same God works all of them in all men. (1 Corinthians, 12:6)

For there is one God... (1 Timothy, 2:5)

Jesus said to him, "... Worship the Lord your God, and serve Him only." (Matthew, 4:10)

You believe that there is one God. Good! Even the demons believe that—and shudder. (James, 2:19)

Now to the King eternal, immortal, invisible, the only God, be honor and glory for ever and ever. (1 Timothy, 1:17)

How can you believe if you accept praise from one another, yet make no effort to obtain the praise that comes fromthe only God? (John, 5:44)

... You have one Lord... (Matthew, 23:9)

As Jesus started on his way, a man ran up to him and fell on his knees before him. "Good teacher," he asked, "What must I do to inherit eternal life?" Jesus answered, "No one is good—except God alone." (Mark 10:17-18)

... We know that an idol is nothing at all in the world and that there is no god but One... for us there is but one God, the God, from Whom all things came and for Whom we live... (1 Corinthians, 8:4-6)

"Why do you ask me about what is good?" Jesus replied. "There is only One Who is good. If you want to enter life [paradise], obey the commandments of [God]." (Matthew, 19:17)

For even if there are so-called gods [surely God is beyond that], whether in heaven or on earth yet for us there is one God, the God, for Whom all things came and for whom we live. (1 Corinthians 8:5-6)

... One Lord, one faith... one God of all, Who is over all and through all and in all. (Ephesians, 4:5-6)

For every house is built by someone, but God is the builder of everything. (Hebrews, 3:4)

To Serve God Alone without Ascribing Equals to Him

Jesus answered, "It is written: 'Worship the Lord your God and serve Him only. (Luke, 4:8)

Jesus said to him, "... Worship the Lord your God, and serve Him only." (Matthew, 4:10)

... My dear friends, flee from idolatry. (1 Corinthians, 10:14)

For they themselves report what kind of reception you gave us. They tell how you turned to God from idols to serve the living and true God... (1 Thessalonians, 1:9-10)

And instead of worshiping the glorious, ever-living God, they worshiped idols made to look like mere people and birds and animals and reptiles [surely God is beyond that]... They exchanged the truth of God for a lie, and worshiped and served created things rather than the Creator [surely God is beyond that]—Who is forever praised... (Romans, 1:23-25)

... If then the light within you is darkness, how great is that darkness! No one can serve two masters. Either he will hate the one and love the other, or he will be devoted to the one and despise the other. You cannot serve both God and money. (Matthew, 6:23-24)

[Jesus:] "No servant can serve two masters... You cannot serve both God and money." (Luke, 16:13)

... Some people are still so accustomed to idols that when they eat such food they think of it as having been sacrificed to an idol, and since their conscience is weak, it is defiled. But food does not bring us near to God; we are no worse if we do not eat, and no better if we do. (1 Corinthians, 8:7-8)

No, but the sacrifices of pagans are offered to demons, not to God, and I do not want you to be participants with demons.  You cannot drink the cup of the Lord and the cup of demons too; you cannot have a part in both the Lord's table and the table of demons.(1 Corinthians, 10:20-21)

So then, about eating food sacrificed to idols: We know that an idol is nothing at all in the world and that there is no God but one.  (1 Corinthians, 8:4)

Dear children, keep yourselves from idols. (1 John, 5:21)

The rest of mankind that were not killed by these plagues still did not repent of the work of their hands; they did not stop worshiping demons, and idols of gold, silver, bronze, stone and wood—idols that cannot see or hear or walk.  (Revelation, 9:20)