Reference for I Samuel 17:29

וַיֹּ֣אמֶר דָּוִ֔ד מֶ֥ה עָשִׂ֖יתִי עָ֑תָּה הֲל֖וֹא דָּבָ֥ר הֽוּא׃

And David said: ‘What have I now done? Was it not but a word?’

BDB