The St. Matthew Passion (also frequently but incorrectly referred to as St. Matthew's Passion; German: Matthäus-Passion), BWV 244 is a Passion, a sacred oratorio written by Johann Sebastian Bach in 1727 for solo voices, double choir and double orchestra, with libretto by Picander (Christian Friedrich Henrici). It sets chapters 26 and 27 of the Gospel of Matthew (in the German translation of Martin Luther) to music, with interspersed chorales and arias. It is widely regarded as one of the masterpieces of classical sacred music. The original Latin title Passio Domini nostri J.C. secundum Evangelistam Matthæum translates to "The Passion of our Lord J[esus] C[hrist] according to the Evangelist Matthew"

Bach did not number the sections of the St Matthew Passion, all of them vocal movements, but twentieth-century scholars have done so. The two main schemes in use today are the scheme from the Neue Bach-Ausgabe (NBA, New Bach Edition) which uses a 1 through 68 numbering system, and the older Bach-Werke-Verzeichnis (BWV, Bach Works Catalog) scheme which divides the work into 78 numbers. Both use lettered subsections in some cases.

Many composers wrote musical settings of the Passion in the late 17th century. Like other Baroque oratorio passions, Bach's setting presents the Biblical text of Matthew 26–27 in a relatively simple way, primarily using recitative, while aria and arioso movements set newly written poetic texts which comment on the various events in the Biblical narrative and present the characters' states of mind in a lyrical, monologue-like manner.

The St Matthew Passion is set for two choirs and two orchestras. Both include two transverse flutes (Choir 1 also includes 2 recorders for No. 19), two oboes, in certain movements instead oboe d'amore or oboe da caccia, two violins, viola, viola da gamba, and basso continuo. For practical reasons the continuo organ is often shared and played with both orchestras. In many arias a solo instrument or more create a specific mood, such as the central soprano aria No. 49, "Aus Liebe will mein Heiland sterben", where the absence of strings and basso continuo mark a desperate loss of security.

The Passion was written for two choruses and orchestras. Choir I consists of a soprano in ripieno voice, a soprano solo, an alto solo, a tenor solo, SATB chorus, two traversos, two oboes, two oboes d'amore, two oboes da caccia, lute, strings (two violin sections, violas and cellos), and continuo (at least organ). Choir II consists of SATB voices, violin I, violin II, viola, viola da gamba, cello, two traversos, two oboes (d'amore) and possibly continuo.

Source: Wikipedia (https://en.wikipedia.org/wiki/St_Matthew_Passion).

Although originally scored for chorus & baroque orchestra, I created this arrangement of "Ich will bei meinem Jesu wachen" (I will watch beside my Jesus) from "St Matthew Passion" (BWV 244 Mvt. 6) for Winds (Flute, Oboe, French Horn & Bassoon) & Strings (2 Violins, Viola & Cello).