Psalm 44:20 New English Translation

²⁰If we had rejected our God,^[a]
and spread out our hands in prayer to another god,^[b]

Psalm 44:20 tn Heb “If we had forgotten the name of our God.” To “forget the name” here refers to rejecting the Lord’s authority (see Jer 23:27) and abandoning him as an object of prayer and worship (see the next line).
Psalm 44:20 tn Heb “and spread out your hands to another god.” Spreading out the hands was a prayer gesture (see Exod 9:29, 33; 1 Kgs 8:22, 38; 2 Chr 6:12-13, 29; Ezra 9:15; Job 11:13; Isa 1:15). In its most fundamental sense זָר (zar, “another; foreign; strange”) refers to something that is outside one’s circle, often making association with it inappropriate. A “strange” god is an alien deity, an “outside god” (see L. A. Snijders, TDOT 4:54-55).

New English Translation (NET)