[3:193] 'Our Lord, we have heard a caller calling to belief, saying, "Believe in your Lord!" And we believed. So, our Lord, forgive us our sins and absolve us of our evil deeds, and take us [in death] with the pious.
It means 'We have answered the caller but You are the Guide, so do not leave us to ourselves and do not raise the shadow of your care from us'. Faith (īmān) is included among the causes of security (amān) and one only has faith in the Real from the Real granting him security. The security of the Real for the servant, which is His granting him protection, brings about the faith of the servant in the Real, which is his affirmation (taṣdīq) of Him and his knowledge (maʿrifa) of Him.
And take us [in death] with the pious: They are those chosen for the realities of declaring oneness (ḥaqaÌiq al-tawḥīd), those who stand for God by the conditions of single-mindedness (sharāÌi? al-tafrīd), and stay with God by the special characteristics of disengagement (khaṣāÌiṣ al-tajrīd).