John Gill Commentary Psalms 106:25

"But murmured in their tents, And hearkened not unto the voice of Jehovah." — Psalms 106:25 (ASV)

But murmured in their tents
Throughout their tents; the murmuring was general; they murmured often; but what is here referred to seems to be their murmuring upon the report of the spies, (Numbers 14:2Numbers 14:27Numbers 14:29) .

To murmur against God and his providence is a very great evil; and which generally proceeds on one or other of these two things; either because men have not so much of the good things of this world as others have; or because they endure more afflictions, and so are ready to charge the ways of God with inequality; not considering that God is a Sovereign, and may do with his own what he pleases; and that they are deserving of nothing at his hands; and that their punishment or chastisement is less than their sins deserve.

And hearkened not unto the voice of the Lord ;
to go up and possess the land; they disbelieved his word, and were disobedient to his command. The use the apostle makes of this, see (Hebrews 3:7Hebrews 3:8) , and of their other provocations, of their lust, idolatry, fornication, tempting of God, and murmuring against him, see (1 Corinthians 10:6–11) .