What follows is my provisional translation (in other words, not official or authorized; see here for more) of a table prayer penned by ‘Abduʼl-Bahá; its original Arabic text is published in Máʼidiy-i-Ásmání, vol. 9, p. 74.
There is a special heading accompanying the prayer where it appears in Máʼidiy-i-Ásmání, which indicates that the prayer is meant to be recited after eating a meal. While the recitation of table prayers is not a prescribed ritual in the Baháʼí Faith, Baháʼís are free to say such prayers if and when they feel moved to do so.
An older English translation of this prayer—published in Tablets of Abdul-Baha Abbas, pp. 167–8—is available online here.
Thanks be unto Thee, O my Lord and my heart’s Desire, for these blessings, and praise be unto Thee for these feasts and favors. O Lord, my Lord! Cause us to ascend unto Thy Kingdom, seat us at the tables of Thy Divinity, and nourish us with the sustenance of Thy Presence. Cause us, moreover, to attain unto the sweetness of beholding Thy Beauty, for this is the ultimate object of desire, the greatest gift, and the loftiest bestowal. Make this attainment easy for us, O Lord, my Lord. Thou, verily, art the Most Generous, the Most Bountiful; and Thou art, in truth, the Bestower, the Almighty, the Merciful.
A typed version of the complete Arabic text of this prayer appears below (vocalization mine).
Adib Masumian 