5 occurrences in 5 dictionaries
Reference: Ilai
Easton
an Ahohite, one of David's chief warriors (1Ch 11:29); called also Zalmon (2Sa 23:28).
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Hastings
One of David's heroes (1Ch 11:29). In the parallel list (2Sa 23:28) the name appears as Zalmon, which is probably the more correct text.