Psalm 44:20 (ESV)

20 If we had forgotten the name of our God or spread out our hands to a foreign god,

In Psalm 44:17 the writer had already confessed: I have been faithful to the Lord. Now, while death is threatening them, imagine if they had forgotten the name of their God and if they would have reached out their hands to idols… Imagine if they had such a straying, faithless behaviour…