Question: What lyric is Shine a Light named after?

Context articles: Lille Stesichorus
Shine a Light (Billy Bragg and Joe Henry album)
Marylou (album)
Shine a Light (McFly song)
Midnight Special (song)
Lighthouse paradox
Lyric soprano
Let Your Light Shine on Me
Lydia Netzer
Shine in the Light

The Lille Stesichorus is a papyrus containing a major fragment of poetry usually attributed to the archaic lyric poet Stesichorus, discovered at Lille University and published in 1976.
 It has been considered the most important of all the Stesichorus fragments, confirming his role as an historic link between genres as different as the epic poetry of Homer and the lyric poetry of Pindar.
 The subject matter and style are typical of his work generally but not all scholars have accepted it as his work.
 The fragment is a narrative treatment of a popular myth, involving the family of Oedipus and the tragic history of Thebes, and thus it sheds light on other treatments of the same myth, such as by Sophocles in "Oedipus Tyrannos" and Aeschylus in "Seven Against Thebes".
 The fragment is significant also in the history of colometry since it includes lyric verses that have been divided into metrical "cola", a practice usually associated with the later career of Aristophanes of Byzantium.
Shine a Light: Field Recordings from the Great American Railroad is a 2017 album of field recordings made by British singer Billy Bragg and American musician Joe Henry in waiting rooms and trackside at railway stations on a journey between Chicago and Los Angeles in March 2016.
 The project was conceived after Henry produced Bragg's thirteenth studio album "Tooth & Nail" at his home studio in South Pasadena.
 It was released on the Cooking Vinyl label on 23 September 2016.
 The project is named after a lyric in the traditional folk song "Midnight Special" (mistakenly credited to Lead Belly after a 1934 recording he made).
Marylou is the second studio album by Swiss singer-songwriter Anna Rossinelli.
 The album was released on 3 May 2013 by Universal Music.
 The first single from the album was "Let It Go" and it was released on 6 March 2013.
 The album was re-released under the new title Marylou Two on 4 February 2014, with the bonus tracks "Shine in the Light", "Let It Go (Live)", "Vagabonds (Live)", "Reconcile" and "Shine In The Light (Piano Version)".
"Shine a Light" is the second single from English band McFly's fifth studio album, "Above the Noise".
 The single features vocals from singer Taio Cruz.
 The single was released on 7 November 2010 via digital download, with a physical release following the next day.
 A free download was available for members of the band's new website, SuperCity.
 The song received mostly positive reviews from pop music critics.
 On 3 November 2010, the song was added to BBC Radio 1's A-List.
 The song peaked the number 9 in UK Airplay Chart.
 McFly secured their fifteenth Top 5 hit with "Shine a Light" on the UK Singles Chart.
"Midnight Special" is a traditional folk song thought to have originated among prisoners in the American South.
 The title comes from the refrain, which refers to the passenger train "Midnight Special" and its "ever-loving light" (sometimes "ever-living light"):
The lighthouse paradox is a situation in which the speed of light is apparently exceeded.
 Upon observation, it would seem that a lighthouse is able to shine light on one object and then, in a manner that is faster than the speed of light, shine light on another object.
 However this is not true, as the photons from the light source that are hitting object 1 are not traveling from object 1 to object 2, but rather, different photons are reflected off each object.
 Meaning, there is no movement of the "light beam" from one object to another, as though it were a single entity of matter, but a projection of many entities that reflect off of the different objects.
 The lighthouse paradox essentially proposes a situation which violates Einstein's theory of special relativity using superluminal signalling.
 In other words, a condition in which information or matter is traveling faster than the speed of light.
 Through careful analysis this paradox is resolved.
A lyric soprano is a type of operatic soprano voice that has a warm quality with a bright, full timbre that can be heard over an orchestra.
 The lyric soprano voice generally has a higher tessitura than a soubrette and usually plays ingenues and other sympathetic characters in opera.
 Lyric sopranos have a range from approximately middle C (C4) to "high D" (D6).
 This is the most common female singing voice.
 There is a tendency to divide lyric sopranos into two groups, light and full.
"Let Your Light Shine on Me" is a traditional gospel blues song recorded in 1929 by Blind Willie Johnson.
 The song itself is also known as "Let It Shine on Me", "Light from the Lighthouse" and "Light from Your Lighthouse".
Her debut novel "Shine Shine Shine" was named one of the 100 Notable Books of 2012 by "The New York Times".
 The book tells the story of a pregnant woman with alopecia, her astronaut husband, their autistic son, and her mother, who is dying from cancer.
"Shine in the Light" is a single by Swiss singer-songwriter Anna Rossinelli.
 The song was released as the lead single from her re-released second studio album "Marylou" called "Marylou Two" (2014).
 The song has peaked to number 4 on the Swiss Singles Chart.
 The song was written by Anna Rossinelli, Georg Schlunegger, Georg Dillier, Manuel Meisel.
 The Swiss television studio SRF used the single Shine in the Light as their official song for the broadcast of the 2014 Winter Olympics.