Shell Script: Want to delete two consecutive lines matching pattern from specific line

I want to delete specific two consecutive lines matching patterns from specific line from a file. For e.g. file contents are like below. a b c Name: 123 xyz Name: 456 abc I want to find the lines starting from line 4, matching 1st line pattern starting with Name: and matching 2nd line pattern starting with whitespace and delete the two consecutive lines. Any efficient way to do this in shell using sed or something else? To be a bit more clear, I want to remove signing/checksum information from the MANIFEST.MF. Sample MANIFEST.MF like below. From the below manifest file, I want to remove the entry Name: where Name: entry can be in one line or 2(or more) lines. Initially my solution was like find the first Name: entry followed by SHA-256-Digest: entry and delete to the end of the file. Unfortunately this solution has a problem of removing one needed entry in the middle. For e.g. NetBeans-Simply-Convertible: is also being removed. So, now I want to remove Name: entry if available in 1 line or entry spanned across 2 or more lines. But I should not lose entries like NetBeans-Simply-Convertible: while removing Name: entries. Already I am removing SHA-256-Digest: entries with the below command on file with sed -i "/^\SHA-256-Digest: /d" $manifest_file -------------------------------- Manifest-Version: 1.0 Version-Info: .... Name: com/abc/xyz/pqr/client/relationship/message/notifier/Relati onshipUpdateNotifierFactory.class SHA-256-Digest: cSSyk6Y2L2F9N6FPtswUkxjF2kelMkGe4bFprcQ+3uY= Name: com/abc/xyz/pqr/client/relationship/ui/BaseRelationshipView $5.class SHA-256-Digest: w9HgRjDuP024U4CyxeKPYFe6rzuzxZF3b+9LVG36XP8= Name: com/abc/xyz/pqr/client/impl/MofRelationshipAgentImpl.class SHA-256-Digest: GwIBIU+UdPtjyRhayAVM90Eo+SwCT/kP65dI59adEnM= Name: com/abc/xyz/pqr/client/settings/ConvertibleProperties.class NetBeans-Simply-Convertible: {com/abc/xyz/pqr/client/settings}Con vertibleProperties SHA-256-Digest: 5FszAtfpPXcLx/6FBWbfeg6E4fwFMRozV+Q+3rReATc= ... Expected Output: Manifest-Version: 1.0 Version-Info: .... NetBeans-Simply-Convertible: {com/abc/xyz/pqr/client/settings}Con vertibleProperties ...