"The Rigveda “reflects not so much a wandering life…. as a life stable and fixed, a life of halls and cities, and shows sacrificial cases in such detail as to lead one to suppose that the hymnists were not on the tramp, but were comfortable well-fed priests” [...] If the first home of the Aryans can be determined at all by the conditions topographical and meteorological, described in their early hymns, then decidedly the Punjab was not that home. For here there are neither mountains nor monsoon storms to burst, yet storm and mountain belong to the very marrow of the Rigveda. ...[it is] ―a district [...] where monsoon storms and mountain scenery are found, that district, namely, which lies South of Umballa (or Ambālā). It is here, in my opinion, that the Rigveda, taken as a whole, was composed. In every particular, this locality fulfils the physical conditions under which the composition of the hymns was possible, and what is of paramount importance, is the first district east of the Indus that does so."
January 1, 1970
https://en.wikiquote.org/wiki/Rigveda