Ayub 30:31

30:31 My harp is used for ¹  mourning

and my flute for the sound of weeping.

[30:31]  ¹ tn The verb הָיָה (hayah, “to be”) followed by the preposition ל (lamed) means “to serve the purpose of” (see Gen 1:14ff., 17:7, etc.).