Shema (H8088) is the noun form of shama (to hear), meaning 'that which is heard' — a report, proclamation, fame, or rumor. It is distinct from the famous Shema of Deuteronomy 6:4 (which is an imperative verb). This noun describes both trustworthy reports and damaging rumors.
In Isaiah 53:1, shema opens the Servant Song in one of the most quoted texts in the New Testament: 'Who has believed our report?' (John 12:38; Rom 10:16). The word choice is arresting — the Servant's identity is conveyed through heard news. Faith comes by hearing (Rom 10:17). Before the cross was a visible event, it was first a shema — a proclamation, a report to be believed. The great paradox: the most world-shaking event in history would be rejected not because of lack of evidence, but because of unwillingness to believe the report. Who has believed what we have heard?