(Devarim, Ibid.) "Therefore, I command you in respect to this thing this day" (followed by the ear-boring ceremony [Ibid. 16 and 17]) — The boring of the ear is performed in the daytime and not at night.
(Devarim 15:16) "And it shall be, if he say to you: I shall not leave": I might think (that he says this) one time; it is, therefore, written (Shemoth 21:5) "And if the slave say, will say" — He must say it and repeat it.