Contradiction with Proverbs 27:1
While 1 Samuel 20:10 discusses seeking knowledge of the future, Proverbs 27:1 advises against boasting about tomorrow as the future is uncertain.
Proverbs 27:1: Boast not thyself of to morrow; for thou knowest not what a day may bring forth. [to...: Heb. to morrow day]
Contradiction with James 4:14
1 Samuel 20:10 involves planning for tomorrow, whereas James 4:14 emphasizes human ignorance about what will happen the next day.
James 4:14: Whereas ye know not what [shall be] on the morrow. For what [is] your life? It is even a vapour, that appeareth for a little time, and then vanisheth away. [It...: or, For it is]
Contradiction with Matthew 6:34
1 Samuel 20:10 shows concern for future events, but Matthew 6:34 teaches not to worry about tomorrow, focusing instead on today's concerns.
Matthew 6:34: Take therefore no thought for the morrow: for the morrow shall take thought for the things of itself. Sufficient unto the day [is] the evil thereof.