Musannaf Ibn Abi Shaybah 31380 — A man supplicating with the inside

Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: Sincerity is like this, and he pointed with his finger; and supplication is like this, meaning with the inner part of both his palms; and seeking guidance (istikharah) is like this. And he then raised both his hands and turned their backs towards his face.