'Appointed' in the Bible

“I hate [the hypocrisy of] your New Moon festivals and your appointed feasts.They have become a burden to Me;I am weary of bearing them.

“Listen carefully, I have appointed him [David, representing the Messiah] to be a witness to the nations [regarding salvation],A leader and commander to the peoples.

“The smallest one will become a thousand (a clan),And the least one a mighty nation.I, the Lord, will quicken it in its [appointed] time.”