Invocations after eating
 

الْحَمْـدُ للهِ الَّذي أَطْعَمَنـي هـذا وَرَزَقَنـيهِ مِنْ غَـيْرِ حَوْلٍ مِنِّي وَلا قُوَّةٍ

180. Alhamdu lillaahil-lathee 'at'amanee haathaa, wa razaqaneehi, min ghayri hawlin minnee wa laa quwwatin.

Praise is to Allah Who has given me this food and sustained me with it though I was unable to doit and powerless.

Reference: At-Tirmithi, Abu Dawud, and Ibn Majah. See also Al-Albani, Sahih At-Tirmithi 3/159.

Or/Tabi

الْحَمْـدُ للهِ حَمْـداً كَثـيراً طَيِّـباً مُبـارَكاً فيه، ]غَيْرَ مَكْفِيٍّ[ وَلا مُوَدَّعٍ وَلا مُسْتَغْـنىً عَنْـهُ رَبُّـنا

181. Alhamdu lillaahi hamdan katheeran tayyiban mubaarakan feehi, ghayra [makfiyyin wa laa] muwadda'in, wa laa mustaghnan 'anhu Rabbanaa.

All praise is to Allah, praise in abundance, good and blessed. It cannot [be compensated for, nor can it] be left, nor can it be done without , our Lord.

Reference:
Al-Bukhari 6/214, At-Tirmithi 5/507.