Al-shaykhan
Abu Bakr al-Siddiq and 'Umar al-Faruq, may Allah be pleased with them both.
Al-khatanan
The two sons-in-law of the Messenger of Allah ﷺ.
Acknowledging the merit of the two shaykhs and loving the Prophet's two sons-in-law expresses a sound stance towards the Companions. The accompanying mention of wiping over the khuffs shows that an established transmitted legal practice is also among these recognized features.