مِفْتَاحُ الْجَنَّةِ الصَّلَاةُ ، وَمِفْتَاحُ الصَّلَاةِ الطُّهُور
"Cennetin anahtarı namaz, namazın anahtarı ise abdesttir."
The Prophet (peace and blessings of Allah be upon him) said:
"The key to Paradise is prayer; the key to prayer is Wudu (ablution)."(reported from Jabir Ibn Abdullah)