`Abdullah Ibn Mas'ud related that the Prophet (pbuh) said, "I have considered having a man lead people at prayer and going myself to those who stay back from attending the congregational prayer to bum their houses down upon them..” "If the people forgo the Friday Prayer, Allah will set a seal on their hearts for them to become heedless.”1

"Whoever misses three Friday prayers without a legal excuse, Allah will set a seal on his heart.”2

"Whoever misses the Friday prayer without a (legal) excuse or a danger will be accounted amongst the hypocrites in a record that cannot be erased or altered.”3

Hafsa (may Allah be pleased with her) related, the Prophet (pbuh) said, "Going to the Friday prayer is obligatory for every male who has reached puberty.”4