Exodus 34:20 YLT

¹⁸  'The feast of unleavened things thou dost keep; seven days thou dost eat unleavened things, as I have commanded thee, at an appointed time, the month of Abib: for in the month of Abib thou didst come out from Egypt.

¹⁹  'All opening a womb 'are' Mine, and every firstling of thy cattle born a male, ox or sheep;

²⁰  and the firstling of an ass thou dost ransom with a lamb; and if thou dost not ransom, then thou hast beheaded it; every first-born of thy sons thou dost ransom, and they do not appear before Me empty.

²¹  'Six days thou dost work, and on the seventh day thou dost rest; in ploughing-time and in harvest thou dost rest.

²²  'And a feast of weeks thou dost observe for thyself; first-fruits of wheat-harvest; and the feast of in-gathering, at the revolution of the year.