Assalamu Alaykum! Answer - He said: "My Lord! Indeed my bones have grown feeble, and grey hair has spread on my head, And I have never been unblest in my invocation to You, O my Lord! "And verily I fear my relatives after me, and my wife is barren. So give me from Yourself an heir. "Who shall inherit me, and inherit (also) the posterity of Ya‘qûb (Jacob) (inheritance of the religious knowledge and Prophethood, not of wealth.). And make him, my Lord, one with whom You are Well-Pleased!" (19:4-6) Before asking, Prophet Zakariyya (AS) praised Allah’s kindness and acknowledged His past blessings. This teaches us that du'a begins with recognizing Allah’s generosity, strengthening our faith in His response. True reliance on Allah comes from knowing He has always provided and will continue to do so.