וביום השמיני ימול בשר ערלתו

 Riddle:

ראובן the firstborn (בכור) from both parents was a perfectly healthy baby, yet, no Bris will be done on him because of מתו אחיו מחמת מילה. His two younger brothers died when they had their Bris.

How is this possible?

וביום השמיני ימול בשר ערלתו Riddle: ראובן the firstborn (בכור) from both parents was a perfectly healthy baby, yet, no Bris will be done on him because of מתו אחיו מחמת מילה. His two younger brothers died when they had their Bris. How is this possible?   Answer: Triplets a) ראובן is a triplet born Friday night בין השמשות. His two younger brothers were born on שבת proper. Reuvain's Bris gets postponed to Sunday while his two younger brothers have it done בזמנו on Shabbos. b) ראובן was born by C-section (Bris gets postponed to Sunday.) Hence his two younger brothers have their Bris done  before ראובן,