If you are praying a three or four unit prayer and you sit after you completed the second prostration in the second unit, you recite the middle testimony of faith which is: (Bismillahi wa Billahiwa alhamdulillahi wal-asmā`ul-husna kulluhā lillahi. Ashhadu an lā ilāha ila Allāhu wahdahu lā sharīka lahu wa ashhadu anna Muhammadan abduhu wa rasūluhu).

After one has prostrated for the last time, one sits and recites the last testimony of faith similar to the middle testimony of faith one recited before: (Bismillahi wa Billahi wa alhamdulillahi wal-asmā`ul-husna kulluhā lillahi. [Or alternatively:] At-tahiyyātu lillāhi was-šalawāt waŧ-ŧayyibātu. Ashhadu an lā ilāha ila Allāhu wahdahu lā sharīka lahu wa ashhadu anna Muhammadan abduhu wa rasūluhu. Allāhumma salli ‘ala Muhammad wa āli Muhammad. Wa bārik ‘ala Muhammad wa āli Muhammad. Ka mā salayta wa bārakta ‘ala Ibrāhīm wa ‘ala āli Ibrāhīm. Innaka Hamīdun Majīd).