BT Tan 20b(41) :בינקותיה לא דכירנא בקשישותיה דכירנא‏ : I do not remember (anything) of his childhood. I do remember (something) of his old age
See the entire entry for dkr vb. to remember

BT Tan 20b(41) :בינקותיה לא דכירנא‏ : I do not remember (anything) of his youth
See the entire entry for yanqū, yanqūṯā n.f. childhood, youth

BT Tan 20b(41) :בינקותיה לא דכירנא בקשישותיה דכירנא‏ : I do not remember anything of his childhood. I remember something of his old age
See the entire entry for qaššīšū, qaššīšūṯā n.f. seniority