On August 19, 1981, a staff psychiatrist at Northampton State Hospital filed a petition for civil commitment in the Northampton Division of the District Court Department, 1 to commit Bruce Kalil, a patient at the *608 hospital, for an additional one year. G. L. c. 123, §§ 7 and 8. A hearing on this petition was scheduled by the District Court judge for September 3, 1981, which was fifteen days after the filing of the petition. Neither Kalil nor anyone on his behalf had requested this date or a continuance. On September 3, Kalil orally moved to dismiss the petition. The motion was denied without prejudice and the hearing was continued until September 10, 1981, over the objection of Kalil. At the hearing on September 10, Kalil filed a motion to dismiss the petition on the grounds that he had been denied his statutory right to a hearing within fourteen days of the filing of the petition for his civil commitment. The judge denied the motion, found facts to warrant Kalil’s commitment pursuant to G. L. c. 123, §§ 7 and 8, and entered an order of civil commitment to Northampton State Hospital for a period not to exceed one year. The judge found that the hearing was not held within fourteen days as required by G. L. c. 123, § 7, but that this requirement was not jurisdictional. On report to the Appellate Division of the District Courts under G. L. c. 123, § 9, the decision of the District Court was reversed and the petition for commitment was ordered dismissed. The case is here on appeal from the decision and order of the Appellate Division. The parties do not dispute that the order of commitment would have expired on September 10, 1982, had it not been reversed by the Appellate Division, and that no effort was made to seek any further commitment.
Since the order for civil commitment had expired prior to the filing of the briefs or oral argument in this court it is clear that the case is moot. “Ordinarily, litigation is considered moot when the party who claimed to be aggrieved ceases to have a personal stake in its outcome.”
Blake
v.
Massachusetts Parole Bd.,
*609
The parties concede that the case is technically moot but urge that the issue should be decided nonetheless since the issue is one of great importance and ‘“capable of repetition, yet evading review.”’
Brach
v.
Chief Justice of the Dist. Court Dep’t,
We therefore consider whether the statute requires that a civil commitment hearing be commenced within fourteen days of the filing of the petition.
The plaintiff argues that the legislative history, the absence of any specific language in the statute delineating the consequences of failure to hold the hearing within the required period, and the absence of any showing of prejudice in this case requires the conclusion that the requirement is only directory. We do not agree.
The language of G. L. c. 123, § 7 (c), as amended through St. 1978, c. 367, § 71C, is clear and unambiguous: “The hearing
shall
be commenced within fourteen days of the filing of the petition unless a delay is requested by the person or his counsel” (emphasis supplied). “[Wjhere the language of the statute is plain and unambiguous . . . legislative history is not ordinarily a proper source of construction.”
Hoffman
v.
Howmedica, Inc.,
Because of the view we take of this case, it is not necessary for us to reach the constitutional arguments advanced by Kalil.
The order of the Appellate Division is affirmed.
So ordered.
Notes
We do not consider the propriety of a petition for commitment brought by a staff psychiatrist since the parties have not raised the issue *608 and its resolution is unnecessary in view of our disposition of the case. See G. L. c. 123, §§ 1 and 7.
