Hadith 1:

حدثني محمد بن مسعود، قال: حدثني عبد الله بن محمد، عن الوشاء، قال: حدثنا علي بن عقبة، عن أبيه، قال، قلت لأبي عبد الله عليه السلام: ان لنا خادما لا تعرف ما نحن عليه، فإذا أذنبت ذنبا وأرادت أن تحلف بيمين: قالت لا وحق الذي إذا ذكرتموه بكيتم، قال، فقال: رحمكم الله من أهل البيت

Narrated from Uqba bin Khalid who said,

I said to Abu Abd-Allah Imam Sadiq (عليه السلام), "We have a maid who does not know what we are upon (i.e. is not a Shia). So whenever she does something wrong and wants to swear an oath (i.e. to ask for kindness), she says, "No (forgive me), for the sake of the one over whom you cry whenever you mention him."

Hearing this Imam Sadiq (عليه السلام) said, "May Allah have mercy on all you members of the household."

[Source: Rijal al-Kashshi, Hadith. 636]

(Note: This seems to indicate the narrator’s family would cry upon Imam Husayn (عليه السلام) to such as extent that the maid also was aware of its importance and for this very reason Imam Sadiq (عليه السلام) also prayed for them)