Hebrews 13:19
“But I beseech you the rather to do this, that I may be restored to you the sooner.” His thus praying was [the act] of one who loved them greatly, and that not simply, but with all earnestness, that so, he says, I may come to you speedily. The earnest desire to come to them is [the mark] of one conscious to himself of nothing [wrong], also the entreating them to pray for him.
Therefore having first asked their prayers, he then himself also prays for all good things on them.
Source: Homilies on the Epistle to the Hebrews (New Advent)