John Gill Commentary Psalms 44:1

"We have heard with our ears, O God, Our fathers have told us, What work thou didst in their days, In the days of old." — Psalms 44:1 (ASV)

We have heard with our ears, O God
The church being in distress calls to mind the past favours of God to his people, in order to encourage her faith and hope; and this expression, delivered in such a form, shows the clearness, evidence, and certainty of what was heard; and which was heard not only as a tradition from father to son; but being recorded in the writings of Moses and the prophets, and these things read both in private and in public, were heard with the ear;

our fathers have told us [what] works thou didst in their days, in the
times of old :
such as the signs and wonders in Egypt, the slaying of the firstborn there, and the bringing of the people of Israel from thence with a mighty hand and outstretched arm; which fathers were used to tell in the ears of their sons, and sons' sons; and of which there were memorials continued in future ages, which led children to ask their parents the meaning of them; when they informed them of the wondrous works of Providence done in former times, and by which means they were handed down from age to age: see (Exodus 10:2) (12:26) (13:8) .