ויכלו. מנין שאנו אומרין אותו בעמידה, לפי שהוא עדות להקב"ה, שברא עולמו בששה ימים, ועדות מעומד, דכתיב ועמדו ב' האנשים. ואיתא בפרק כל כתבי, בשעה שאדם אומר ויכלו, שני מלאכים המלוים לו לאדם, מניחים ידיהם על ראשו, ואומרים לו, וסר עונך וחטאתך תכופר. וא"ת ומאי שנא פסוק זה, וי"ל, משום דכתיב גבי עדות, אם לא יגיד ונשא עונו, וזה שאומר ויכלו, לא עכב עדותו והגידו: ויכלו, “they had been completed;” whence does the practice to recite this paragraph during kiddush while standing originate? It is because this paragraph is a testimony, and testimony must always be given while the witness is standing. (Compare Maimonides laws about testimony, chapter 9, halachah 7 stating that minors are not acceptable as witnesses as it is required that two men, i.e. adults, stand when testifying,” i.e. ועמדו שני האנשים, “the two adult witnesses shall be standing, etc.”) (Deut 19,17). We are taught further in the Talmud tractate Shabbat folio 119, that when a Jew returns home from the synagogue on Friday night, and he recites this paragraph, two angels will place their hands upon his head and bless him, saying: “may all your sins be removed from you, and may you enjoy complete atonement.” If you were to ask where we can find this line in scripture? We refer you to Leviticus 5,8, where testimony is discussed, and the Torah condemns someone who knows of something that he is required to testify to, but refuses to give such testimony. It says there that by failing to give his testimony, he will have to bear his sin. It follows that testifying truthfully results in one’s sins being removed. Giving testimony that the Lord has created the universe in six days concluding on Friday night, by reciting this paragraph while standing, is such testimony.