What is meant by the faith mentioned in the verse: "Indeed, those who believed and did righteous deeds were to have Gardens of Paradise as a lodging?" And does applying the six pillars of faith fulfill one of the conditions for entering the highest Paradise? And is what is meant by righteous deeds to do many of them?

If the mention of faith (iman) is coupled with righteous deeds (amal salih), then faith refers to the actions of the heart, and righteous deeds refer to the earnings of the limbs. Faith in the six pillars of Iman is among the greatest righteous deeds for entering Paradise. Monotheism (Tawhid) is the greatest of righteous deeds, followed by righteous deeds performed with the limbs such as prayer (salat), charity (zakat), and fasting (sawm). These are of two types: obligatory (fara'id) and supererogatory (mustahabbat). The best way to draw near to Allah is through the obligatory deeds, followed by the supererogatory deeds which compensate for deficiencies and earn Allah's love. The more a servant increases in doing good deeds, the higher their rank will be in the Gardens.