Ps 31:22

I had said in my alarm,

     'I am driven far from thy sight.'

But [in fact (אָכֵ֗ן)] thou didst hear my supplications,

     when I cried to thee for help.

     Ps 31:22 RSV.  In the Septuagint and Vulgate "But in fact" (אָכֵ֗ן) becomes "Therefore" (ergone, Divine Office:  ideo; διὰ τοῦτο):

Therefore thou has heard the voice of my prayer (Douay-Rheims).... 

Therefore you listened to the voice of my petition (NETS)....