Charles H. Spurgeon on Psalms 133:2

The precious ointment... that ran down upon the beard... that went down to the skirts of his garments. Magnificence, misnamed by churls extravagance and waste, is the invariable attribute of all true love. David recognized this truth when he selected the profuse anointing of Aaron with the oil of consecration at his installation into the office of High Priest as a fit emblem of brotherly love. There was waste in that anointing, too, as well as in the one which took place at Bethany. For the oil was not sprinkled on the head of Aaron, though that might have been sufficient for the purpose of a mere ceremony. The vessel was emptied on the High Priest's person, so that its contents flowed clown from the head upon the beard, and even to the skirts of the sacerdotal robes. In that very waste lay the point of the resemblance for David. It was a feature that was very likely to strike his mind; for he, too, was a wasteful man in his way. He had loved God in a manner which exposed him to the charge of extravagance. He had danced before the Lord, for example, when the ark was brought up from the house of Obededom to Jerusalem, forgetful of his dignity, exceeding the bounds of decorum, and, as it might seem, without excuse, as a much less hearty demonstration would have served the purpose of a religious solemnity. —Alexander Balmain Bruce, in "The Training of the Twelve," 1877.