Have I not written thirty sayings for you, sayings of counsel and knowledge,
NMVHave not I written to youi excellent things in counsels and knowledge,
OJBHave not I written to thee shloshim (thirty sayings) in mo'etzot (counsels) and da'as,
T4TI have written [RHQ] 30 ◄sayings/things that wise people have said► from which you will receive good advice and you will be able you to know many good/useful things.