There has been some debate about the protasis and apodosis in Proverbs 2. The NET Bible note here states:
sn Verses 1-11 form one long conditional sentence in the Hebrew text: (1) the protasis (“if…”) encompasses vv. 1-4 and (2) the apodosis (“then…”) consists of two parallel panels in vv. 5-8 and vv. 9-11 both of which are introduced by the particle אָז (’az, “then”).
On the other hand, Lange's Commentary explains:
[Proverbs 2:1 sq. DE WETTE and NOYES conceive of the first two verses as not conditional, but as containing the expression of a direct and independent wish: Oh that thou wouldest receive, etc. The LXX, Vulg., LUTHER, etc., make the first verse conditional, but find the apodosis in Proverbs 2:2. MUENSCHER finds in Proverbs 2:2 an independent condition, and not a mere sequence to the preceding; so HOLDEN, with a slightly different combination of the parts of Proverbs 2:2: If by inclining thine ear…thou wilt incline thine heart, etc. M., H., STUART and others find the apodosis of the series of conditional clauses in Proverbs 2:5, agreeing in this with the E. V. These diverse views do not essentially modify the general import of the passage. ZÖCKLER it will be observed finds the apodosis in Proverbs 2:5 and 9, Proverbs 2:6–8 being parenthetical.—A.].