The Roman Emperor Constantine was believed to have granted dominion over the Western Roman Empire to Pope Sylvester I, out of gratitude for the pope curing him of leprosy. This so-called Donation of Constantine was used during the Middle Ages to justify the Church's temporal power and general meddling in world politics (such as the "right" to crown emperors, which was exercised up till the time of Napoleon).

In the fifteenth century, the humanist Lorenzo Valla proved this document to be a shameless forgery. In addition to arguing that, from a logical standpoint, no king in his right mind would ever give away half his kingdom, and that no other sources ever attest that Constantine ever had leprosy at all, he demonstrated that the Latin of the text was anachronistic and could not have been the language of the Roman court. Aside from several repeated factual errors--like referring to Byzantium as Constantinople, which hadn't been founded yet, or describing the emperor's crown as bejeweled like a medieval king's, not silken or laurel like a Roman's--the numerous grammatical and lexical errors suggested that the author was not a native speaker of Latin, and wasn't even particularly fluent.

So, to answer your question: No, probably not.

In the Scroll of Esther (the Jewish text which details the events commemorated by the holiday Purim), King Achashverosh makes this offer to Queen Esther. I am not aware of any other instances in Jewish religious texts. Queen Esther asks instead for the King to spare her life and that of the Jews living in Persia.

If possible, can you site a particular passage and/or king that you are referring too?

Dr. Thamar Eilam Gindin is an expert on ancient Persian language and culture. Her book "The Book of Esther Unmasked" is about the Book of Esther from a Persian perspective. Here's what she had to say:

The short answer would be "No", but here's a longer one about the very offer:

Here's a tentative translation of what "The Book of Esther, Unmasked" says about it

even to the half of my kingdom (Esther 5:4): Up to half the kingdom looks like a wild exaggeration, like many other instances in the Book of Esther. So maybe not half of the kingdom, but we know from other historical sources that the king sometimes promises cities and armies.

Here is what Herodotus says. {Background: Last time on our soap opera: Xerxes falls in love with his brother's wife but she doesn't yield. He thinks having his son marry her daughter would be an excellent way to win her heart. And then he falls in love with the daughter - Artaynte}. Xerxes' wife, Amestris*, wove and gave to him a great gaily-colored mantle, marvellous to see. Xerxes was pleased with it, and went to Artaynte wearing it. Being pleased with her too, he asked her what she wanted in return for her favors, for he would deny nothing at her asking. ... she said to Xerxes, “Will you give me whatever I ask of you?” He promised this, supposing that she would ask anything but that; when he had sworn, she asked boldly for his mantle. Xerxes tried to refuse her, for no reason except that he feared that Amestris might have clear proof of his doing what she already guessed. He accordingly offered her cities instead and gold in abundance and an army for none but herself to command. Armies are the most suitable of gifts in Persia. (translation from http://perseus.uchicago.edu/)

We will get to the end of this story in the commentary to chapter 7, but let's just note now that cities and armies are considered legitimate gifts in Ancient Persia.

This story, by the way, is not considered very reliable, but it is a story told about Xerxes, and it constitues a part of the big picture we get about this king and his image - whether the events themselves are truth or fiction.

(pp.94-5 in the Hebrew version. For the English version, like the page and you'll get notified when the crowdfunding campaign starts).

*in Chapter 1 we identify Ahasuerus with Xerxes and in chapter 7 we unidentify Esther with Amestris

source: https://www.facebook.com/zereshbook/posts/1599684893629824

Lowly M.Div. here, Hebrew scholars please help!

Donahue & Harrington Sacra Pagina: The Gospel of Mark refer to Esther 5:6 & 7:2 and note the irony of Herod's promise: as ruler of a Roman client state, he cannot divide his kingdom.

Other reference re: Mark also point back to Esther. I've not yet been able to find anything in ATLA re: these verses specifically. I can confirm via Bibleworks search of Codex Leningradensis that this Hebrew phrase only occurs in Ester 5:3; 5:6; & 7:2.