John Gill Commentary Nehemiah 9:20

"Thou gavest also thy good Spirit to instruct them, and withheldest not thy manna from their mouth, and gavest them water for their thirst." — Nehemiah 9:20 (ASV)

You gave also your good spirit to instruct them
In the knowledge of the laws delivered to them; the spirit of prophecy, according to Ben Melech, and which Aben Ezra interprets of the spirit put upon the seventy elders, (Numbers 11:17Numbers 11:25) ,

and did not withhold your manna from their mouth ;
all the while they were in the wilderness, until they came to Canaan's land; called the Lord's manna, because prepared by him, and given by him to them; a part or portion and gift from the Lord, as Ben Melech, from which it had its name, see (Exodus 16:15)

and gave them water for their thirst ;
which seems to have respect to the last rock stricken for them, after their many provocations in the wilderness, (Numbers 20:11) .