In Psalm 39:1, David resolves to bridle his tongue — the same concern for controlled speech as this prayer for a guard on the mouth.

In Psalm 17:3-5, David declares his mouth does not transgress — complementing the prayer here for divine guard over the lips.

In Psalm 106:33, Moses spoke unadvisedly — an example of why a guard on the lips is necessary, as prayed here.

In Psalm 71:8, the psalmist prays for a mouth filled with praise — a positive counterpart to the request for a guarded mouth here.

In Psalm 119:29, the psalmist asks to be removed from lying — a similar plea for pure speech as the request for a guarded mouth here.

In Micah 7:5, 'keep the doors of thy mouth' echoes the same phrase — warning against trusting even close companions.

In James 1:26, controlling the tongue is essential to true religion — reinforcing the importance of the prayer for a guarded mouth here.

In James 3:2, the one who does not offend in word is perfect — highlighting the need for the divine help requested here.