Here "Now" is used to mark a break in the main storyline. Here Matthew tells background information about Judas and the signal he planned to use to betray Jesus. (See: [[rc://en/ta/man/translate/writing-background]])
# saying, "Whomever I kiss, he is the one. Seize him."
This direct quotation can be stated as an indirect quotation. AT: "saying that whomever he kissed was the one they should seize" (See: [[rc://en/ta/man/translate/figs-quotations]])