Psalms 121:3
He will not allow your foot to be moved. He who keeps you will not slumber. Behold, he who keeps Israel will neither slumber nor sleep.
Wisdom shapes a keeper israel that is traced in speech and habits. Psalms 121:3: notice "who" and "keeps". Keep keeper israel in hospitality and listening—honor God behind closed doors.
This passage belongs to Psalms, a poetry/wisdom witness, naming keeper israel. Placed in ch. 121, the nearby lines set its tone. There’s a line into wisdom & worship. The nearby sentences supply the texture.