Psalm 106 recounts the history of Israel's rebellion against God after their deliverance from Egypt. Verse 25, "but murmured in their tents, and didn’t listen to Yahweh’s voice," specifically refers to a time in the wilderness when the Israelites were discontent and complained (murmured) against God and Moses. Let's break down the meaning:

"Murmured in their tents": This indicates that the Israelites grumbled and complained quietly among themselves, within the privacy of their own dwelling places. The "tents" signify their nomadic lifestyle in the wilderness. This private discontent spread amongst them, creating a climate of dissatisfaction and rebellion.

"Didn’t listen to Yahweh’s voice": This is the core of their sin. "Yahweh's voice" refers to God's commands, instructions, and promises. In this context, it likely refers to God's guidance and the instructions given through Moses (who acted as God's representative). Their murmuring demonstrated a lack of trust in God's plan and a refusal to obey his directions. They were not heeding his warnings or trusting in his provision for them.

In essence, the verse portrays a failure of faith and obedience. The Israelites:

Lacked gratitude: They were delivered from slavery in Egypt, but quickly forgot God's miracles and provision.
Were impatient: They didn't trust God's timing or plan for their journey.
Were disobedient: They refused to listen to God's instructions, preferring their own desires and complaints.
Spread negativity: Their murmuring poisoned the atmosphere and undermined the faith of others.

The verse serves as a warning against the dangers of discontent, lack of trust in God, and disobedience. It highlights the importance of listening to God's word and trusting in his provision, even in difficult circumstances.

In the broader context of Psalm 106, this is just one example of Israel's repeated failures. The psalm serves as a confession of their sins and a plea for God's continued mercy, despite their unfaithfulness.