Do Muslims believe the Zabur is corrupt?

In a nutshell: The Zabur (Psalms) is the message revealed to Dawud (pbuh). In my research, I have found that the Zabur has been tampered with by Jewish "holy men" (stated by Jewish scholars Berlin and Brettler) What is the Zabur? The Zabur was revealed to the Prophet Dawood (King David), and it was one of the three recognised holy messages revealed to previous prophets before the quran. The three messages being: The tawrah (torah) revealed to musa as (moses) The Zabur (psalms) revealed to dawud as (King david) The injil (bible) revealed to Isa as (Jesus christ) All of the messages have been mentioned multiple times in the quran so we are sure that the revelations came from Allah. But because we are focusing on the Zabur for now there are three quotes in the quran referring to the Zabur. One verse would be: وَرَبُّكَ أَعْلَمُ بِمَن فِي السَّمَاوَاتِ وَالْأَرْضِ ۗ وَلَقَدْ فَضَّلْنَا بَعْضَ النَّبِيِّينَ عَلَىٰ بَعْضٍ ۖ وَآتَيْنَا دَاوُودَ زَبُورًا - 17:55 "And your Lord is most knowing of whoever is in the heavens and the earth. And We have made some of the prophets exceed others [in various ways], and to David We gave the book [of Psalms]." The word "Zabur" in Arabic means "book", "inscription", "writing". The alternative, less  accepted, meaning of "Zabur" would be "zimrah" which means "songs". Prophet Dawud would not recite but rather sing the verses from the Zabur. Narrated Abu Huraira: The Prophet said, "The reciting of the Zabur (i.e. Psalms) was made easy for David. He used to order that his riding animals be saddled and would finish reciting the Zabur before they were saddled. And he would never eat except from the earnings of his manual work." The Zabur is constructed of 150 chapters (songs) and is broken down to 5 sections. First section—chapters 1 to 41 Second section—chapters 42 to 72 Third section – chapters 73 to 89 Fourth section – chapters 90 to 106 Fifth section – chapters 107 to 150 Has the Zabur been corrupted? This question is difficult to answer. I have searched the entire web to find Quranic verses, hadiths, articles on the Zabur. But, as it turns out, not much is known about the Zabur. Allah (swt) mentions in the Quran. وَلَقَدْ كَتَبْنَا فِي الزَّبُورِ مِن بَعْدِ الذِّكْرِ أَنَّ الْأَرْضَ يَرِثُهَا عِبَادِيَ الصَّالِحُونَ - 21:105 And We have already written in the book [of Psalms] after the [previous] mention that the land [of Paradise] is inherited by My righteous servants.  In this verse Allah tells us that he has already given us a book which mentions that the land of paradise is inherited by his righteous servants. The only other book known to man with that verse is the book of psalms. It contains the following verse: "The righteous shall inherit the land, And live in it forever." [37:29] The psalms is the book used by Jews and traditional western and eastern Christians. Their scholars (Berlin and Brettler) have stated that Dawud (King David) is not the only author of the Psalms. They have claimed that numerous other "holy men" have added and edited versus in the Psalms. Which would mean that the Psalms is no longer the message revealed to Dawud in the first instance. Conclusion The conclusion is that even though there was no point of corrupting the Zabur, it got corrupted none the less. Words got changed and versus have been added. They did to it what they have done to the tawrah and injil. References http://en.wikipedia.org/wiki/Zabur https://www.al-kitab.org/webkitab/psa_toc.htm  https://www.quora.com/What-is-Zabur-about