It is narrated from Sayyiduna Fadl bin Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "The prayer is in sets of two rak‘ahs; after every two rak‘ahs, recite the tashahhud, display humility, submissiveness, and poverty, spread your hands, raise them before your Lord, and with their inner sides facing your face, supplicate by saying: 'O Lord, O Lord.' Whoever does not do so, a very stern statement was made about him."