This is a beautiful and widely known verse! It’s a prayer invoking sacred rivers, often recited during bathing. Here’s the full verse with a word-by-word translation to help you learn Sanskrit:
गङ्गे च यमुने चैव गोदावरि सरस्वति ।
नर्मदे सिन्धु कावेरि जलेऽस्मिन् सन्निधिं कुरु ॥
गङ्गे (Gange): In the Ganga (river) - Locative case च (Cha): And - Indeclinable conjunction यमुने (Yamune): In the Yamuna (river) - Locative case च (Cha): And - Indeclinable conjunction एव (Eva): Also - Indeclinable adverb गोदावरि (Godavari): O Godavari (river) - Vocative case सरस्वति (Sarasvati): O Sarasvati (river) - Vocative case नर्मदे (Narmade): O Narmada (river) - Vocative case सिन्धु (Sindhu): O Sindhu (river) - Vocative case कावेरि (Kaveri): O Kaveri (river) - Vocative case जले (Jale): In this water - Locative case of “jala” (water) अस्मिन् (Asmin): In this - Locative case of “idam” (this) सन्निधिं (Sannidhim): Presence - Accusative case कुरु (Kuru): Do, make - Imperative verb (second person singular)