Psalm 5:1

לַמְנַצֵּחַ אֶל־הַנְּחִילֹות מִזְמֹור לְדָוִד׃

Rough Word-by-word:
To the overseeing one upon the flutes. A Psalm of David.

Smooth Translation:
To the leader upon the flutes. A Psalm of David.

לַמְנַצֵּחַ preposition and definite article with Piel participle from נָצַח (he oversaw) ms "to/for the overseeing one"

אֶל־הַנְּחִילֹות preposition and definite article with noun fp "upon the flutes" (Greswell notes that הָלַל means to perforate or pierce through - thus an instrument perforated with holes. Also הָלִיל is to play on a flute or pipe.)

מִזְמֹור noun ms "a psalm"

לְדָוִד preposition with proper noun ms "of/for/to David"