Yes, the verse below, to me that we can pray in Purgatory, for people on earth. Will they do any good, that is another question.
Luk 16:26 And besides all this, between us and you there is a great gulf fixed, that they that would pass from hence to you may not be able, and that none may cross over from thence to us.
Luk 16:27 And he said, I pray thee therefore, father, that thou wouldest send him to my father’s house;
Luk 16:28 for I have five brethren; that he may testify unto them, lest they also come into this place of torment.
Luk 16:29 But Abraham saith, They have Moses and the prophets; let them hear them.
Luk 16:30 And he said, Nay, father Abraham: but if one go to them from the dead, they will repent.
Luk 16:31 And he said unto him, If they hear not Moses and the prophets, neither will they be persuaded, if one rise from the dead.