נזיר ב׳:ט׳ - ב׳:י׳

הריני נזיר ונזיר לכשיהיה לו בן – whomever had accepted upon himself a [period of] Naziriteship, and additionally accepted upon himself another Naziriteship when he has for himself a son.

משלים את שלו – first and he shaves and brings his [hair] offering and afterwards counts that [Nazirite period] for [the birth of] his son.

הריני נזיר כשיהיה לי בן ונזיר – he accepted upon himself first the Naziriteship for [the birth of] his son,

and he began to count his own, and afterwards, his son was born to him prior to his completing thirty days.

מניח את שלו ומונה את של בנו – for since he accepted upon himself the Naziriteship for [the birth of] his son first, immediately when his son was born to him, he needs to set aside his own and to count [the Naziriteship] of his son’s and afterwards, he completes his own.

עד שבעים לא הפסיד כלום – when he interrupts his Naziriteship and counts the Naziriteship for his son, and he shaves and returns and completes his own [for the completion] of his Naziriteship from the seventy that he had already counted until the one-hundred that he had vowed, they are thirty days that are found between shaving [his hair] of the Naziriteship of his son to the shaving of the completion of his Naziriteship which are thirty days, he does not lose anything. But if he counted more than seventy days before he began the Naziriteship for his son and he came to interrupt his own Naziriteship in order to begin the Naziriteship of his son, when he shaves on the Naziriteship of his son and he comes to complete his own Naziriteship until the one hundred days that he had vowed. If it was found that there were less than thirty days between shaving on his son’s Naziriteship and the shaving for his own Naziriteship, and it is impossible that there would be between each shaving less than thirty days, it is found that he loses all of those days that he counted above the seventy.