Клялись

31 Потому́ и назва́л он сие́ ме́сто:

31 [Because, That Is Why, Therefore] and [called, named, identify] he this place:

Вирса́вия,

[Bathsheba, Beersheba],

и́бо тут о́ба они́ клялись

[for, because] here both [they, they are] клялись

Therefore that place was called Beersheba,
because there both of them swore an oath.
Genesis 21:31 ESV

Wherefore he called that place Beersheba;
because there they sware both of them.
Genesis 21:31 KJV