blood is thicker than water
- (family, idiomatic) Family relations and loyalties are stronger than relationships with people who are not family members.
1866, Anthony Trollope, chapter 30, in The Belton Estate:
- Blood is thicker than water, is it not? If cousins are not friends, who can be?
- c. 1915, Lucy Fitch Perkins, The Scotch Twins, ch. 5,
- The old clans are scattered now, but blood is thicker than water still, and you're welcome to the fireside of your kinsman!
relationships are stronger within the family