Is Isti`adhah sufficient to express one's intention?
The place of intention is the heart, and it is a condition for the validity of ‘Ibadah (worship). The Prophet (peace be upon him) said:
“Actions are only according to intentions, and every person shall have but that which they intended.”
Therefore, Isti‘adhah (seeking refuge with Allah from Satan) does not suffice instead of intention. And Allah knows best.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.