'Commencement' in the Bible

lo, now, he is hidden in one of the pits, or in one of the places, and it hath been, at the falling among them at the commencement, that the hearer hath heard, and said, There hath been a slaughter among the people who are after Absalom;

and giveth them into the hand of the Gibeonites, and they hang them in the hill before Jehovah; and the seven fall together, and they have been put to death in the days of harvest, in the first days, the commencement of barley-harvest.

And Rizpah daughter of Aiah taketh the sackcloth, and stretcheth it out for herself on the rock, from the commencement of harvest till water hath been poured out upon them from the heavens, and hath not suffered a fowl of the heavens to rest upon them by day, or the beast of the field by night.