Psalm 91:1 New English Translation

91 As for you, the one who lives^[b] in the shelter of the Most High,^[c]
and resides in the protective shadow^[d] of the Sovereign One^[e]—

Psalm 91:1 sn Psalm 91. In this psalm an individual (perhaps a priest) addresses one who has sought shelter in the Lord and assures him that God will protect him from danger (vv. 1-13). In vv. 14-16 God himself promises to keep his loyal follower safe.
Psalm 91:1 tn Heb “[O] one who lives.”
Psalm 91:1 sn The divine title “Most High” (עֶלְיוֹן ʿelyon) pictures God as the exalted ruler of the universe who vindicates the innocent and judges the wicked. See especially Pss 7:17; 9:2; 18:13; 21:7; 47:2.
Psalm 91:1 sn The Lord is compared here to a bird who protects its young under the shadow of its wings (see v. 4).
Psalm 91:1 sn The divine name used here is “Shaddai” (שַׁדַּי, shadday; see also Ps 68:14). Shaddai (or El Shaddai) is the Sovereign God of the world who grants life/blesses and kills/judges. In Genesis he blesses the patriarchs with fertility and promises numerous descendants. Outside Genesis he both blesses/protects and takes away life/happiness.

New English Translation (NET)