Why did Laban say he had «divined» that Yahweh had blessed him?

Laban said he had «divined» because he was a Mesopotamian householder who read omens — and the word he chose betrays exactly that.

When Jacob asks to leave at Genesis 30:27, Laban answers with one of the most revealing sentences in the patriarchal narratives:

אִם־נָא מָצָאתִי חֵן בְּעֵינֶיךָ נִחַשְׁתִּי וַיְבָרֲכֵנִי יְהוָה בִּגְלָלֶךָ

im na matsati chen be-eineikha nichashti va-yvarakheni Yahweh biglalekha

«If I have found favour in your eyes, I have divined, and Yahweh has blessed me on your account.» — Genesis 30:27

The pivotal word is nichashti (H5172, nachash, "to practise divination, to read omens"). The lexicon is blunt about it: this is the technical verb for reading the future by signs — bird-flight, liver-shapes, cups of wine. It is the same verb the Torah will later forbid Israel to use.

Look where else nachash surfaces. Leviticus 19:26 commands lo tenachashu — «you shall not practise divination» — and Deuteronomy 18:10 lists menachesh «one who divines» among the abominations of the nations Israel is to drive out, alongside child-sacrifice and sorcery. Every time the verb appears outside Genesis in a covenant context, it is being condemned. The apostate kings Manasseh (2 Kings 21:6) and Ahaz's son (2 Chronicles 33:6) divine; Ben-Hadad's pagan envoys divine (1 Kings 20:33). No prophet ever divines. No patriarch ever divines in his own name.

The two other Genesis instances belong to Joseph — but Joseph speaks them as the Egyptian vizier, in costume:

הֲלוֹא זֶה אֲשֶׁר יִשְׁתֶּה אֲדֹנִי בּוֹ וְהוּא נַחֵשׁ יְנַחֵשׁ בּוֹ

halo zeh asher yishteh adoni bo ve-hu nachesh yenachesh bo

«Is this not the cup my lord drinks from? With it he indeed divines.» — Genesis 44:5

Joseph is performing — playing the Egyptian official the brothers think he is. Laban is not performing. He is speaking in his own voice, in his own household, about his own household gods.

There is one further precision the morphology supplies. Across all eleven canonical instances of nachash, every form except Laban's is Piel — the intensive stem reserved for the active practice. Laban's nichashti at Genesis 30:27 is the only canonical Niphal. A grammatical singularity to match a theological one: the only patriarchal-narrative figure to use the verb of himself uses it in a form no one else uses for the verb at all.

There is also a wordplay at the root level. Nachash the verb (H5172) and nachash the noun «serpent» (H5175) share the three consonants n-ḥ-š and the same etymological ground — "to hiss, to whisper a spell." They are two separate dictionary entries, but the root they share is one. Laban's divination-confession echoes, at root level, the serpent of Eden — the original whisperer whose hissed counsel Eve heeded. The Torah is doing more than reporting Laban's vocabulary; it is placing him on the wrong side of the covenant by the consonants he uses.

The Septuagint, two centuries before Christ, made the divinatory force unmistakable. It rendered nichashti with oionisamēn — «I took an omen by bird-flight», the most explicit Greek word for pagan augury — and replaced Yahweh with the generic ho theos in Laban's mouth. The older Greek translator heard exactly what the Hebrew text was signalling.

For the full reading — including the «for your sake» formula that Yahweh-bless-on-account-of-the-elect verse binds to Abram, Jacob, and Joseph, and the two-layer reading of the peeled rods — read Jacob's Flocks: The Bethel Promise Begins to Burst Forth.