14th Ayah from Surah Ar Ra'd
Sahih International
To Him [alone] is the supplication of truth. And those they call upon besides Him do not respond to them with a thing, except as one who stretches his hands toward water [from afar, calling it] to reach his mouth, but it will not reach it [thus]. And the supplication of the disbelievers is not but in error [i.e. futility].
Abdul Haleem
The only true prayer is to Him: those they pray to besides Him give them no answer any more than water reaches the mouth of someone who simply stretches out his hands for it- it cannot do so: the prayers of the disbelievers are all in vain.
Mohsin Khan/Hilali
For Him (Alone) is the Word of Truth (i.e. none has the right to be worshipped but He). And those whom they (polytheists and disbelievers) invoke, answer them no more than one who stretches forth his hand (at the edge of a deep well) for water to reach his mouth, but it reaches him not, and the invocation of the disbelievers is nothing but an error (i.e. of no use).
Taqi Usmani
True prayers are to be directed to Him alone; and those to whom they pray instead of Him do not respond to them at all, but they are like one who stretches his hands towards water so that it may reach his mouth (by itself), while it is not to reach it. And the prayer of the disbelievers (that they make to false gods) is nothing but straying in void.
Pickthall
Unto Him is the real prayer. Those unto whom they pray beside Allah respond to them not at all, save as (is the response to) one who stretcheth forth his hands toward water (asking) that it may come unto his mouth, and it will never reach it. The prayer of disbelievers goeth (far) astray.
Pickthall
For Him (alone) is prayer in Truth: any others that they call upon besides Him hear them no more than if they were to stretch forth their hands for water to reach their mouths but it reaches them not: for the prayer of those without Faith is nothing but (futile) wandering (in the mind).