but it is true what they say, blood is thicker than water,
This is a misused quote. "The blood of the covenant is thicker than the water of the womb"
The first reference to anything similar to this was 1180 in ‘Reynard the Fox’ by Heinrich der Glîchezære and was written as “Kin-blood is not spoilt by water.” The form “blood is thicker than water” appeared in 1670 in John Ray’s work ‘Proverbs’ although the ‘invention’ of the phrase is credited to Sir Walter Scott (from his 1815 novel ‘Guy Mannering’).
https://www.helpforwriters.me/etymology-series-history-proverbs/
