The study explores the sustainability in Internet of Things (IoT) by conducting bibliometric analysis of extant literature on the topic. For bibliometric analysis, we employ Scientific Procedures and Rationales for Systematic Literature Reviews (SPAR-4-SLR) method of systematic literature review. Year-wise, Author-wise, Citation-wise, Country-wise, Source-wise, Affiliation-wise and keywords-wise listing are the parameters to identify the trend and future scope of sustainability in IoT. We use Scopus database to list the extant literature. The study suggests that sustainability in IoT is explored in different fields like smart cities, agriculture, edge computing, block-chain, forecasting and energy utilization. This study provides insights on current trends and future scope of sustainable use of IoT