Sunan Abi Dawud Book 15, Hadith 6
‘Abd Allaah bin ‘Amr said “ I heard the Apostle of Allaah(ﷺ) say “There will be emigration after emigration and the people who are best will be those who cleave most closely to places which Abraham migrated. The worst of its people will remain in the earth cast out by their lands, abhorred by Allaah, collected along with apes and swine by fire.””
‘Amir said “A man came to ‘Abd Allaah bin ‘Amr while the people were with him. He sat with him and said “Tell me anything that you heard from the Apostle of Allaah(ﷺ)”. He said “I hears the Apostle of Allaah(ﷺ) say “A Muslim is he from whose tongue and hand the Muslims remain safe and an emigrant is he who abandons what Allaah has prohibited.””
The Prophet (ﷺ) said: It will turn out that you will be armed troops, one is Syria, one in the Yemen and one in Iraq. Ibn Hawalah said: Choose for me, Messenger of Allah, if I reach that time. He replied: Go to Syria, for it is Allah's chosen land, to which his best servants will be gathered, but if you are unwilling, go to your Yemen, and draw water from your tanks, for Allah has on my account taken special charge of Syria and its people.