سُنَنُ أَبِي دَاوُدَ
Sunan Abi Dawud 5258
General Behavior (Kitab Al-Adab)
Regarding killing snakes
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، عَنِ ابْنِ عَجْلاَنَ، بِهَذَا الْحَدِيثِ مُخْتَصَرًا قَالَ فَلْيُؤْذِنْهُ ثَلاَثًا فَإِنْ بَدَا لَهُ بَعْدُ فَلْيَقْتُلْهُ فَإِنَّهُ شَيْطَانٌ .
The tradition mentioned above has also been transmitted by Ibn 'Ajilan through a different chain of narrators briefly. This version has: He should give it a warning three times. If it appears to him after that, he should kill it, for it is a devil.
Sunan Abi Dawud, 5258Hasan Sahih (Al-Albani)حسن صحيح (الألباني)