Do Not Forget to Pray

The prophet PBUH said:
'Whoever takes a seat and fails to remember Allah, has incurred upon himself a loss from Allah, and whoever liesdown (relaxes) and fails to remember Allah, has incurred upon himself a loss from Allah'
[Abu-Dawud]

The Prophet PBUH aslo said:
'Whenever a people sit in a gathering in wich they fail to remember Allah and send prayers upon the Prophet they incur a loss upon themselves and if Allah willed He would punish them and if He willed He would forgive them'
[At-Tirmidhee]

Similarly, he PBUH said:
'Whenever a people rise from a gathering in wich they failed to remember Allah, they rise as if they had arisen from the corpse of an donkey and incurring upon themselves sadness'
[Abu Dawud]