In connection with the formal ratification of the treaty it would appear that certain shrines or chapels were erected in honour of Enlil, Ninkharsag, Ningirsu and Babbar. We may conjecture that this was done in order that the help of these deities might be secured for the preservation of the treaty. According to Entemena's narrative,[9] chapels or shrines were erected to these four deities only, but the Stele of the Vultures contains a series of invocations addressed not only to Enlil, Ninkharsag, and Babbar, but also to Enki, Enzu, and Ninki,[10] and it is probable that shrines were also erected in their honour. These were built upon the frontier beside the two stelæ of delimitation, and it was doubtless at the altar of each one of them in turn that Eannatum and Enakalli took a solemn oath to abide by the terms of the treaty and to respect the frontier. The oaths by which the treaty was thus ratified are referred to upon the Stele of the Vultures[11] by Eannatum, who invokes each of the deities by whom he and Enakalli swore, and in a series of striking formulæ calls down destruction upon the men of Umma should they violate the terms of the compact. "On the men of Umma," he exclaims, "have I, Eannatum, cast the great net of Enlil! I have sworn the oath, and the men of Umma have sworn the oath to Eannatum. In the name of Enlil, the king of heaven and earth, in the field of Ningirsu there has been..., and a ditch has been dug down to the water level.... Who from among the men of Umma by his word or by his ... will go back upon the word (that has been given), and will dispute it in days to come? If at some future time they shall alter this word, may the great net of Enlil, by whom they have sworn the oath, strike Umma down!"