Proverbs 26:2 As the bird by wandering, as the swallow by flying, so the curse causeless shall not come. 
I Samuel 17: 12 ¶Now David was the son of that Ephrathite of Beth–lehem–judah, whose name was Jesse; and he had eight sons: and the man went among men for an old man in the days of Saul. 13 And the three eldest sons of Jesse went and followed Saul to the battle: and the names of his three sons that went to the battle were Eliab the firstborn, and next unto him Abinadab, and the third Shammah. 14 And David was the youngest: and the three eldest followed Saul. 15 But David went and returned from Saul to feed his father’s sheep at Beth–lehem. 16 And the Philistine drew near morning and evening, and presented himself forty days. 17 And Jesse said unto David his son, Take now for thy brethren an ephah of this parched corn, and these ten loaves, and run to the camp to thy brethren; 18 And carry these ten cheeses unto the captain of their thousand, and look how thy brethren fare, and take their pledge... 29 And David said, What have I now done? Is there not a cause?