Q.The individual is saying that some companions use to say Yaa Rasoolillaah, by my mother and father. How do we understand that?
A.The shaykh said they didn’t mean they are swearing by their mother and father, rather what was meant was I would ransom my mother & father for your life O Messenger of Allaah (Sallahu alayhi wa sallam). So it’s like they were saying the Messenger (Sallahu alayhi wa sallam) is more beloved to them then their mother and father. If they had to ransom their father and mother then verily the life of the Messenger (Sallaahu alayhi wa sallam) is more dearer to them.
This also took place from the time of the Prophet (Sallaahu alayhi wa sallam).
Sa’aad ibn abi Waqqaas and he was the first one to throw a weapon in the way of Allaah azza wa ja’al i.e. fought in the way of Allaah azza wa ja’al and he said this. He said verily I would ransom my father and mother for you. So this shows you this statement was in the time of the Prophet (Sallaahu alayhi wa sallam).
Shaykh Saalih ibn Muhammad al-Luhaydaan (May Allaah preserve him) (Kitaab-ut-Tawheed Class 01.12.12) Riyadh.