Exodus 7:25

Καὶ ἀνεπληρώθησαν ἑπτὰ ἡμέραι μετὰ τὸ πατάξαι Κύριον τὸν ποταμόν.

And seven days were fulfilled after the LORD has smitten the river.

וימלא שׁבעת ימים אחרי הכות־יהוה את־היאר׃