Hadithcore
Hadith #530250

Yahya related to me that Malik said, "I heard that Umar ibn al- Khattab said, 'A night in Rukba (a valley near Taif,) is more preferable to me than ten nights in ash-Sham.' " Malik said, "He meant to lengthen and preserve their lives because of the severity of the plague in ash-Sham ."

وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ قَالَ بَلَغَنِي أَنَّ عُمَرَ بْنَ الْخَطَّابِ، قَالَ لَبَيْتٌ بِرُكْبَةَ أَحَبُّ إِلَىَّ مِنْ عَشَرَةِ أَبْيَاتٍ بِالشَّامِ ‏.‏ قَالَ مَالِكٌ يُرِيدُ لِطُولِ الأَعْمَارِ وَالْبَقَاءِ وَلِشِدَّةِ الْوَبَإِ بِالشَّامِ ‏.‏

References2 variants
Sunnah.com reference
Book 45, Hadith 25
Arabic/English book reference
Book 45, Hadith 26