Reference for Pesachim 144:1

שלא נתנה שבת לדחות [וסיפא נתנה שבת לדחות אצלו]

<br> so that the Sabbath does not stand to be overridden whereas in the second clause the Sabbath stands to be overridden by him; [thus] here, [too], surely the Sabbath stands to be overridden in respect of a public sacrifice. R. Ashi said to R. Kahana: But here too [in the first clause] the Sabbath stands to be overidden in connection with infants in general? Nevertheless it was not given [to be overridden] in connection with this man, he answered him.

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