Shaking hands with polytheists

Abu Abdullah al-Asqalani said: One who saw Ibn Muhayriz informed me that he shook hands with a Christian in the mosque of Damascus.

Ash'ath said: Al-Hasan al-Basri considered it disliked for a Muslim to shake hands with a Jew or a Christian.

Ash'ath said that al-Hasan said: Indeed, the polytheists are impure, so do not shake hands with them. Whoever has shaken hands with them should perform ablution.

Abd al-Malik said: I asked Ata about shaking hands with a Magian, and he considered it disliked.