Psalms 141:3

(3) Watch.—The image drawn from the guard set at city gates at night seems to indicate the evening as the time of composition of the psalm.

Door of my lips.—Comp. “doors of thy mouth” (Micah 7:5), and so in Euripides, πύλαι στόματος. For the probable motive of the prayer, see Introduction. The poet’s feeling is that of Xenocrates: “I have often repented of having spoken, but never of having been silent.”