Tehillim 127 - Lag BaOmer and a segula for being blessed with sons
Tehillim 127:4 - "Kehitzim beyad gibor, ken bnei haneurim" - (As arrows in the hand of a mighty man, so are the sons of one's youth.)
The Maharal of Prague teaches that the word for arrow, "keshet" (קשת), is formed from three words - locks - black - curls (קווצותיו- שחורות -תלתלים)".
Therefore, the mekubalim derive a beautiful segula from these words of Tehillim: one should make a commitment - be'ezrat Hashem, bli neder - that if Hashem blesses you with a son, then, when he turns three, you will undertake (bli neder) to bring him to Meron and perform the "chalake (the traditional haircut for a three-year-old boy) specifically on Mount Meron. This is where the tradition began with the AriZal (may the memory of the righteous be a blessing), who gave his son his first haircut there. Since then, a tradition has developed in which Jewish boys go out into the fields and forests on Lag BaOmer and play there with bows and arrows, "keshet", in remembrance of the Bar Kokhba revolt.
(The Maharal of Prague)
