The phrase "a vow from" is correct and usable in written English.
It can be used when referring to a promise or commitment made by someone, often in a formal or serious context.
Example: "She made a vow from her heart to always support her family through thick and thin."
Alternatives: "a promise from" or "a commitment from".
OOF: Drugmakers seem to be hiking prescription prices despite a vow from the president in May that some manufacturers would make "massive" cuts.
The White House added that Mr. Obama said he would use his executive branch authority during his second term to advance his goals for clean energy and climate change, repeating a vow from his recent State of the Union address.
Mugabe's comments were followed today by the publication in the state-controlled Herald newspaper of a vow from the president not to cede power whatever the result of the run-off election.
The result of an international human rights campaign, Chicago's reparations legislation passed in May 2015 with a vow from the city's mayor, Rahm Emanuel, that Chicago would "confront its past and come to terms with it".
The report also calls for better support for new mothers and school pupils, and a vow from advertisers to reflect "consumer desire for authenticity and diversity" rather than to use digitally-enhanced images and thin models.
In the thick of this collective euphoria, tinged for some of us with a gnawing grief, I made a vow: from now on I would treasure my university memories – or, as Barlow and co would have put it, never forget.
Before his conception, his mother, a peasant of the tribe of Dan at Zorah, near Jerusalem, was visited by an angel who told her that her son was to be a lifelong Nazirite i.e., one dedicated to the special service of God, usually through a vow of abstinence from strong drink, from shaving or cutting the hair, and from contact with a dead body.
Last week, Mr. Blair postponed elections in Northern Ireland because of fears that its largest party, the Ulster Unionists, would boycott the voting without a firm vow from the I.R.A. to end violence.
She co-founded the #FBrape campaign and won an unprecedented vow from Facebook to act over gender-hate content on its site.
The business evidently exacts a vow of omertà from its members.
