Is it permissible to make a pact with female friends for intercession on the Day of Resurrection, restricting it to entering Paradise or merely to the availability of the opportunity beforehand, and will our remembrance of this promise remain valid?

Love for the sake of Allah is one of the strongest bonds of faith, and loving one another for the sake of Allah is a cause for entering Paradise. Those who love one another must beware of forbidden attachments. Righteous companionship has religious and worldly benefits, and among its greatest benefits is the intercession of believers for one another on the Day of Resurrection, as stated in the authentic hadith (definition) from Abu Sa'id al-Khudri.

Intercession on the Day of Resurrection has three conditions: Allah's permission for the intercessor, His satisfaction with the intercessor, and His satisfaction with the one for whom intercession is made. Intercession only occurs with Allah's permission, and a believer acts in obedience to their Lord and does not pin their hopes on anyone's intercession. As for the narration attributed to Abu Bakr al-Siddiq: "If one of my feet were in Paradise and the other outside it, I would not feel safe from Allah's cunning (or plan)," it has not been transmitted with an authentic or weak chain of narration. What is closer to the truth is what was narrated from Imam Ahmad, that the true comfort for a believer comes with placing the first foot in Paradise.