The Ash Wednesday Communion Song: Qui meditabitur

Qui meditabitur ("He that shall meditate") is the Communio for the Ash Wednesday mass:



The text comes from  Psalm 1, vv 2-3:

He that shall meditate day and night on the law of the Lord, shall bring forth his fruit in due season.

Here's the Ash Wednesday entry from the Catholic Encyclopedia 1913:

Ash Wednesday

The Wednesday after Quinquagesima Sunday, which is the first day of the Lenten fast.

The name dies cinerum (day of ashes) which it bears in the Roman Missal is found in the earliest existing copies of the Gregorian Sacramentary and probably dates from at least the eighth century. On this day all the faithful according to ancient custom are exhorted to approach the altar before the beginning of Mass, and there the priest, dipping his thumb into ashes previously blessed, marks the forehead — or in case of clerics upon the place of the tonsure — of each the sign of the cross, saying the words: "Remember man that thou art dust and unto dust thou shalt return." The ashes used in this ceremony are made by burning the remains of the palms blessed on the Palm Sunday of the previous year. In the blessing of the ashes four prayers are used, all of them ancient. The ashes are sprinkled with holy water and fumigated with incense. The celebrant himself, be he bishop or cardinal, receives, either standing or seated, the ashes from some other priest, usually the highest in dignity of those present. In earlier ages a penitential procession often followed the rite of the distribution of the ashes, but this is not now prescribed.

There can be no doubt that the custom of distributing the ashes to all the faithful arose from a devotional imitation of the practice observed in the case of public penitents. But this devotional usage, the reception of a sacramental which is full of the symbolism of penance (cf. the cor contritum quasi cinis of the "Dies Irae") is of earlier date than was formerly supposed. It is mentioned as of general observance for both clerics and faithful in the Synod of Beneventum, 1091 (Mansi, XX, 739), but nearly a hundred years earlier than this the Anglo-Saxon homilist Ælfric assumes that it applies to all classes of men. "We read", he says,

in the books both in the Old Law and in the New that the men who repented of their sins bestrewed themselves with ashes and clothed their bodies with sackcloth. Now let us do this little at the beginning of our Lent that we strew ashes upon our heads to signify that we ought to repent of our sins during the Lenten fast.

And then he enforces this recommendation by the terrible example of a man who refused to go to church for the ashes on Ash Wednesday and who a few days after was accidentally killed in a boar hunt (Ælfric, Lives of Saints, ed. Skeat, I, 262-266). It is possible that the notion of penance which was suggested by the rite of Ash Wednesday was was reinforced by the figurative exclusion from the sacred mysteries symbolized by the hanging of the Lenten veil before the sanctuary. But on this and the practice of beginning the fast on Ash Wednesday see LENT.  

Here are all the propers for Ash Wednesday, from the Sao Paulo Benedictines:

Tempus quadragesimæ
Feria quarta cinerum
Ad ritus initiales et liturgiam verbi
Introitus: Sap. 11, 24-25.27; Ps. 56 Misereris omnium (3m44.9s - 3516 kb) score
Graduale: Ps. 56, 2. V. 4 Miserere mei, Deus (3m15.9s - 3064 kb) score
Tractus: Ps. 102, 10 et 78, 8 et 9 Domine, non secundum peccata nostra (3m27.7s - 3248 kb) score

Ad benedictionem et impositionem cinerum
Antiphona: Cf. Ioel 2, 13 Immutemur habitu (1m21.5s - 1276 kb) score
Responsorium: Cf. Bar. 3,2. V. Ps. 78,9 Emendemus in melius (2m24.7s - 2264 kb) score

Ad liturgiam eucharisticam
Offertorium: Ps. 29, 2.3 Exaltabo te (1m37.7s - 1528 kb) score
Communio: Ps. 1, 2b.3b Qui meditabitur (45.3s - 710 kb) score

Here are posts on this site about the propers on the day:

The Ash Wednesday Introit: Misereris omnium
Ash Wednesday: Miserere Mei Deus (The Gradual)
Ash Wednesday:  Domine, non secundum (The Tract)
Ash Wednesday: Immutemur habitu and Emendemus in melius (antiphons sung during the imposition of ashes)
Exaltabo Te, Domine (The Offertory)
The Ash Wednesday Communion Song: Qui meditabitur

A holy Lent to all.

Photo taken by (Luca Galuzzi) * http://www.galuzzi.it