Exodus 34:26 YLT

²⁴  for I dispossess nations from before thee, and have enlarged thy border, and no man doth desire thy land in thy going up to appear before Jehovah thy God three times in a year.

²⁵  'Thou dost not slaughter with a fermented thing the blood of My sacrifice; and the sacrifice of the feast of the passover doth not remain till morning:

²⁶  the first of the first-fruits of the land thou dost bring into the house of Jehovah thy God; thou dost not boil a kid in its mother's milk.'

²⁷  And Jehovah saith unto Moses, 'Write for thyself these words, for, according to the tenor of these words I have made with thee a covenant, and with Israel.'

²⁸  And he is there with Jehovah forty days and forty nights; bread he hath not eaten, and water he hath not drunk; and he writeth on the tables the matters of the covenant -- the ten matters.