The federal judge considering a challenge to Oregon's ban on gay marriage said Friday he intends to file his ruling on Monday at noon.

All parties present during an April 23 hearing, including the state, called on U.S. District Judge Michael McShane to strike down Oregon's 2004 voter-approved constitutional amendment limiting marriage to heterosexual couples.

“We simply can't imagine a rationalization for the ban,” a lawyer for the state told McShane.

In anticipation of the ruling, Oregon United for Marriage announced last week that it was planning to host a wedding venue to take place in Portland on the first day gay couples are allowed to marry.

“We don't know which way the judge will rule, but we are hopeful that Oregon is on the verge of making history – and that by next week, all of Oregon's loving, committed couples will be able to wed in our state,” Amy Ruiz, deputy campaign manager for Oregon United for Marriage, said in a statement.

A last-minute request by the National Organization for Marriage (NOM) to intervene in the case temporarily threatened to slow down the case. McShane denied the request last week.

(Related: Federal judge denies NOM's request to intervene in gay marriage case.)