Tobit 6:21 CPDV

¹⁹  Moreover, on that night, burn the liver of the fish like incense, and the demon will be put to flight.

²⁰  In truth, on the second night, you will become ready to receive a physical union like that of the holy Patriarchs.

²¹  And then, on the third night, you will obtain a blessing, so that healthy children may be procreated from you both.

²²  And so, the third night having been accomplished, you will receive the virgin with the fear of the Lord, led more by love of children than by physical desire, so that, as the offspring of Abraham, you will then obtain a blessing in children.