between the parties may contain an express bar to the award of pre-reference and/or pendente lite interest. Since interest is compensatory in nature and is parasitic upon a principal sum not having been paid in time, this Court has frowned upon clauses that bar the payment of interest. It has therefore evolved the test of strict construction of such clauses, and has gone on to state that unless there is a clear and express bar to the payment of interest that can be awarded by an arbitrator, clauses which do not refer to claims before the arbitrators or disputes between parties and clearly bar payment of interest, cannot stand in the way of an arbitrator awarding pre-reference or pendente lite interest. Thus, when one contrasts a clause such as the clause in Second Ambica Construction case [ Ambica Construction v. Union of India , (2017) 14 SCC 323 : (2018) 1 SCC (Civ) 257] with the clause in Tehri Hydro Development Corpn. Ltd. [ Tehri Hydro Development Corpn. Ltd. v. Jai Prakash Associates Ltd. , (2012) 12 SCC 10 : (2013) 2 SCC (Civ) 122] , it becomes clear that unless a contractor agrees that no claim for interest will either be entertained or payable by the other party owing to dispute, difference, or misunderstandings between the parties or in respect of delay on the part of the engineer or in any other respect whatsoever, leading the Court to find an express bar against payment of interest, a clause which merely states that no interest will be payable upon amounts payable to the contractor under the contract would not be sufficient to bar an arbitrator from awarding pendente lite interest under the 1940 Act. As has been held in First Ambica Construction case [ Union of India v. Ambica Construction , (2016) 6 SCC 36 : (2016) 3 SCC (Civ) 36] , the grant of pendente lite interest depends upon the phraseology used in the agreement, clauses