From the scholia to Aristophanes, Birds 1143, where the Attic-dialect version of the headword appears: 'herons [carried the mortar] in hods'. Again at lambda 230.
LSJ does not attest the koine form of the word except in the Suda. The Attic form occurs several times in Aristophanes: Birds 840 as well as 1143 (hod); Clouds 907 and Wasps 600 (pan). Contrary to the etymology proffered here, the term seem not to have been derived from an inseparable intensive λα- (see the Internet resource listed below) and a word for “gape open” but rather is an expanded form of the Attic noun λέκος , meaning “pan.”