Midrasch zu Dewarim 9:5

"Praise the Lord, for He is good; His steadfast love is eternal." Thus let the redeemed of the Lord say, those He redeemed from adversity" (Psalms 107:1-2). This accords with what is stated in Scripture, "For My sake, My own sake, do I act--Lest [My Name] be dishonored" (Isaiah 48:11). He does not say "for My sake" once but "for My sake, for My sake" twice. The Holy Blessed One said, 'I am doing this only so that My Name not be profaned.' Why [is it written] twice, "for My sake, for My sake"? The Holy Blessed One said, 'when you were in Egypt, I redeemed you for the sake of My name, "He saved them for the sake of His name"' (Psalms 106:8). Similarly with [the future redemption from] Edom [, that is, from the control of the Roman Empire and its Christian successors], I will act for the sake of My name. ...