Hymns of the Atharva Veda, by Ralph T.H. Griffith, [1895], at sacred-texts.com
1Vayu collected these: to find their sustenance be Tvashtar's
    care:
   May Indra bless and comfort them, and Rudra look that they
    increase.
 2Take thou the iron axe and make a pair by marks upon their
    ears.
   This sign the Asvins have impressed: let these increase and
    multiply.
 3Even as Gods and Asuras, even as mortal men have done,
   Do ye, that these may multiply in thousands, Asvins! make the
    mark.