ÃÈæÇÈ ÊÞÕíÑ ÇáÕáÇÉ : Hadeeth No:1019 : Ibn Abbas:
The Prophet once stayed for nineteen days and prayed shortened prayers. So when we travel led (and stayed) for nineteen days, we used to shorten the prayer but if we travelled (and stayed) for a longer period we used to offer the full prayer.
...
ßÊÇÈ ÇáÊÝÓíÑ : Hadeeth No:4543 : Abdullah:
The Prophet recited: 'Fahal-min-Muddakir' "And Verily an abiding
torment seized them early in the morning So, taste you My torment and
My warnings' (54.38-39)...